690538480 has 40 divisors (see below), whose sum is σ = 1619731152. Its totient is φ = 273767424.

The previous prime is 690538469. The next prime is 690538481. The reversal of 690538480 is 84835096.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690538481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29154 + ... + 47233.

Almost surely, 2^690538480 is an apocalyptic number.

It is an amenable number.

690538480 is an abundant number, since it is smaller than the sum of its proper divisors (929192672).

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

690538480 is a wasteful number, since it uses less digits than its factorization.

690538480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76513 (or 76507 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 690538480 is about 26278.0988657856. The cubic root of 690538480 is about 883.8854024513.

The spelling of 690538480 in words is "six hundred ninety million, five hundred thirty-eight thousand, four hundred eighty".