690490080 has 144 divisors (see below), whose sum is σ = 2692950624. Its totient is φ = 157824000.

The previous prime is 690490079. The next prime is 690490093. The reversal of 690490080 is 80094096.

690490080 is a `hidden beast` number, since 6 + 90 + 490 + 0 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24171 + ... + 44330.

It is an arithmetic number, because the mean of its divisors is an integer number (18701046).

Almost surely, 2^690490080 is an apocalyptic number.

690490080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

690490080 is an abundant number, since it is smaller than the sum of its proper divisors (2002460544).

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

690490080 is a wasteful number, since it uses less digits than its factorization.

690490080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68529 (or 68518 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 690490080 is about 26277.1779306683. The cubic root of 690490080 is about 883.8647513921.

The spelling of 690490080 in words is "six hundred ninety million, four hundred ninety thousand, eighty".