690660384 has 48 divisors (see below), whose sum is σ = 1847204352. Its totient is φ = 225874688.

The previous prime is 690660371. The next prime is 690660391. The reversal of 690660384 is 483066096.

It is a tau number, because it is divible by the number of its divisors (48).

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, 62784 + ... + 72959.

It is an arithmetic number, because the mean of its divisors is an integer number (38483424).

Almost surely, 2^690660384 is an apocalyptic number.

It is an amenable number.

690660384 is an abundant number, since it is smaller than the sum of its proper divisors (1156543968).

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

690660384 is a wasteful number, since it uses less digits than its factorization.

690660384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135809 (or 135801 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 690660384 is about 26280.4182615117. The cubic root of 690660384 is about 883.9374115376.

The spelling of 690660384 in words is "six hundred ninety million, six hundred sixty thousand, three hundred eighty-four".