1399541472 has 144 divisors (see below), whose sum is σ = 4577489280. Its totient is φ = 397322496.

The previous prime is 1399541471. The next prime is 1399541491. The reversal of 1399541472 is 2741459931.

1399541472 is a `hidden beast` number, since 1 + 39 + 9 + 541 + 4 + 72 = 666.

1399541472 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399541471) 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, 326479 + ... + 330737.

It is an arithmetic number, because the mean of its divisors is an integer number (31788120).

Almost surely, 2^1399541472 is an apocalyptic number.

1399541472 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 1399541472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2288744640).

1399541472 is an abundant number, since it is smaller than the sum of its proper divisors (3177947808).

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

1399541472 is a wasteful number, since it uses less digits than its factorization.

1399541472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4445 (or 4434 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 1399541472 is about 37410.4460278142. The cubic root of 1399541472 is about 1118.5667977448.

The spelling of 1399541472 in words is "one billion, three hundred ninety-nine million, five hundred forty-one thousand, four hundred seventy-two".