1398404920 has 32 divisors (see below), whose sum is σ = 3432449520. Its totient is φ = 508510720.

The previous prime is 1398404879. The next prime is 1398404963. The reversal of 1398404920 is 294048931.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1588657 + ... + 1589536.

Almost surely, 2^1398404920 is an apocalyptic number.

1398404920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1398404920 is an abundant number, since it is smaller than the sum of its proper divisors (2034044600).

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

1398404920 is a wasteful number, since it uses less digits than its factorization.

1398404920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3178215 (or 3178211 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 1398404920 is about 37395.2526398740. The cubic root of 1398404920 is about 1118.2639238748.

The spelling of 1398404920 in words is "one billion, three hundred ninety-eight million, four hundred four thousand, nine hundred twenty".