1397453904 has 320 divisors, whose sum is σ = 5122529280. Its totient is φ = 354170880.

The previous prime is 1397453903. The next prime is 1397453921. The reversal of 1397453904 is 4093547931.

It is a self number, because there is not a number n which added to its sum of digits gives 1397453904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397453903) 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, 1429864 + ... + 1430840.

It is an arithmetic number, because the mean of its divisors is an integer number (16007904).

Almost surely, 2^1397453904 is an apocalyptic number.

1397453904 is a gapful number since it is divisible by the number (14) 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 1397453904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2561264640).

1397453904 is an abundant number, since it is smaller than the sum of its proper divisors (3725075376).

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

1397453904 is a wasteful number, since it uses less digits than its factorization.

1397453904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055 (or 1043 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 1397453904 is about 37382.5347455199. The cubic root of 1397453904 is about 1118.0103664008.

The spelling of 1397453904 in words is "one billion, three hundred ninety-seven million, four hundred fifty-three thousand, nine hundred four".