690691960 has 64 divisors (see below), whose sum is σ = 1786821120. Its totient is φ = 235374720.

The previous prime is 690691957. The next prime is 690691979. The reversal of 690691960 is 69196096.

It is a self number, because there is not a number n which added to its sum of digits gives 690691960.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39375 + ... + 54145.

It is an arithmetic number, because the mean of its divisors is an integer number (27919080).

Almost surely, 2^690691960 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690691960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (893410560).

690691960 is an abundant number, since it is smaller than the sum of its proper divisors (1096129160).

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

690691960 is a wasteful number, since it uses less digits than its factorization.

690691960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14956 (or 14952 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 690691960 is about 26281.0190061192. The cubic root of 690691960 is about 883.9508821149.

The spelling of 690691960 in words is "six hundred ninety million, six hundred ninety-one thousand, nine hundred sixty".