1399289472 has 192 divisors, whose sum is σ = 4804689600. Its totient is φ = 399748608.

The previous prime is 1399289471. The next prime is 1399289483. The reversal of 1399289472 is 2749829931.

1399289472 is a `hidden beast` number, since 1 + 3 + 9 + 92 + 89 + 472 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×1399289472² = 3916022052900077568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1399289471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165213 + ... + 173475.

It is an arithmetic number, because the mean of its divisors is an integer number (25024425).

Almost surely, 2^1399289472 is an apocalyptic number.

1399289472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1399289472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2402344800).

1399289472 is an abundant number, since it is smaller than the sum of its proper divisors (3405400128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1399289472 is an equidigital number, since it uses as much as digits as its factorization.

1399289472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8300 (or 8275 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 1399289472 is about 37407.0778329449. The cubic root of 1399289472 is about 1118.4996577186.

The spelling of 1399289472 in words is "one billion, three hundred ninety-nine million, two hundred eighty-nine thousand, four hundred seventy-two".