1396403904 has 112 divisors (see below), whose sum is σ = 4234622976. Its totient is φ = 397824000.

The previous prime is 1396403891. The next prime is 1396403971. The reversal of 1396403904 is 4093046931.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 537649 + ... + 540239.

Almost surely, 2^1396403904 is an apocalyptic number.

1396403904 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 1396403904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2117311488).

1396403904 is an abundant number, since it is smaller than the sum of its proper divisors (2838219072).

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

1396403904 is a wasteful number, since it uses less digits than its factorization.

1396403904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014 (or 3004 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 1396403904 is about 37368.4881149880. The cubic root of 1396403904 is about 1117.7302844087.

The spelling of 1396403904 in words is "one billion, three hundred ninety-six million, four hundred three thousand, nine hundred four".