690473920 has 28 divisors (see below), whose sum is σ = 1644191784. Its totient is φ = 276189440.

The previous prime is 690473899. The next prime is 690473939. The reversal of 690473920 is 29374096.

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 3 ways as a sum of consecutive naturals, for example, 1078546 + ... + 1079185.

Almost surely, 2^690473920 is an apocalyptic number.

It is an amenable number.

690473920 is an abundant number, since it is smaller than the sum of its proper divisors (953717864).

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

690473920 is a wasteful number, since it uses less digits than its factorization.

690473920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157748 (or 2157738 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 690473920 is about 26276.8704377062. The cubic root of 690473920 is about 883.8578561128.

The spelling of 690473920 in words is "six hundred ninety million, four hundred seventy-three thousand, nine hundred twenty".