1399423872 has 512 divisors, whose sum is σ = 5076172800. Its totient is φ = 330670080.

The previous prime is 1399423871. The next prime is 1399423877. The reversal of 1399423872 is 2783249931.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399423871) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26404198 + ... + 26404250.

It is an arithmetic number, because the mean of its divisors is an integer number (9914400).

Almost surely, 2^1399423872 is an apocalyptic number.

1399423872 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 1399423872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2538086400).

1399423872 is an abundant number, since it is smaller than the sum of its proper divisors (3676748928).

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

1399423872 is a wasteful number, since it uses less digits than its factorization.

1399423872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 142 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

The square root of 1399423872 is about 37408.8742412813. The cubic root of 1399423872 is about 1118.5354667356.

The spelling of 1399423872 in words is "one billion, three hundred ninety-nine million, four hundred twenty-three thousand, eight hundred seventy-two".