1397523456 has 440 divisors, whose sum is σ = 4993369920. Its totient is φ = 380878848.

The previous prime is 1397523443. The next prime is 1397523503. The reversal of 1397523456 is 6543257931.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16837591 + ... + 16837673.

It is an arithmetic number, because the mean of its divisors is an integer number (11348568).

Almost surely, 2^1397523456 is an apocalyptic number.

1397523456 is a gapful number since it is divisible by the number (16) 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 1397523456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2496684960).

1397523456 is an abundant number, since it is smaller than the sum of its proper divisors (3595846464).

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

1397523456 is an equidigital number, since it uses as much as digits as its factorization.

1397523456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 124 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 1397523456 is about 37383.4650079417. The cubic root of 1397523456 is about 1118.0289140769.

The spelling of 1397523456 in words is "one billion, three hundred ninety-seven million, five hundred twenty-three thousand, four hundred fifty-six".