659531940 has 24 divisors (see below), whose sum is σ = 1846689600. Its totient is φ = 175875168.

The previous prime is 659531903. The next prime is 659531953. The reversal of 659531940 is 49135956.

659531940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 659531892 and 659531901.

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, 5496040 + ... + 5496159.

It is an arithmetic number, because the mean of its divisors is an integer number (76945400).

Almost surely, 2^659531940 is an apocalyptic number.

659531940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

659531940 is an abundant number, since it is smaller than the sum of its proper divisors (1187157660).

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

659531940 is a wasteful number, since it uses less digits than its factorization.

659531940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10992211 (or 10992209 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 42.

The square root of 659531940 is about 25681.3539362706. The cubic root of 659531940 is about 870.4529019876.

The spelling of 659531940 in words is "six hundred fifty-nine million, five hundred thirty-one thousand, nine hundred forty".