15690940 has 12 divisors (see below), whose sum is σ = 32951016. Its totient is φ = 6276368.

The previous prime is 15690911. The next prime is 15690971. The reversal of 15690940 is 4909651.

It is a junction number, because it is equal to n+sod(n) for n = 15690896 and 15690905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392254 + ... + 392293.

It is an arithmetic number, because the mean of its divisors is an integer number (2745918).

Almost surely, 2^15690940 is an apocalyptic number.

15690940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15690940 is an abundant number, since it is smaller than the sum of its proper divisors (17260076).

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

15690940 is a wasteful number, since it uses less digits than its factorization.

15690940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784556 (or 784554 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 15690940 is about 3961.1791173841. The cubic root of 15690940 is about 250.3511864413.

The spelling of 15690940 in words is "fifteen million, six hundred ninety thousand, nine hundred forty".