690390156 has 24 divisors (see below), whose sum is σ = 1695695680. Its totient is φ = 218017872.

The previous prime is 690390139. The next prime is 690390157. The reversal of 690390156 is 651093096.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (690390157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1513786 + ... + 1514241.

Almost surely, 2^690390156 is an apocalyptic number.

It is an amenable number.

690390156 is an abundant number, since it is smaller than the sum of its proper divisors (1005305524).

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

690390156 is a wasteful number, since it uses less digits than its factorization.

690390156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3028053 (or 3028051 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 690390156 is about 26275.2765161473. The cubic root of 690390156 is about 883.8221132888.

The spelling of 690390156 in words is "six hundred ninety million, three hundred ninety thousand, one hundred fifty-six".