690671544 has 16 divisors (see below), whose sum is σ = 1726678920. Its totient is φ = 230223840.

The previous prime is 690671543. The next prime is 690671561. The reversal of 690671544 is 445176096.

It is a junction number, because it is equal to n+sod(n) for n = 690671496 and 690671505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690671543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14388967 + ... + 14389014.

Almost surely, 2^690671544 is an apocalyptic number.

It is an amenable number.

690671544 is an abundant number, since it is smaller than the sum of its proper divisors (1036007376).

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

690671544 is a wasteful number, since it uses less digits than its factorization.

690671544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28777990 (or 28777986 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 690671544 is about 26280.6305860419. The cubic root of 690671544 is about 883.9421725309.

The spelling of 690671544 in words is "six hundred ninety million, six hundred seventy-one thousand, five hundred forty-four".