131766728 has 32 divisors (see below), whose sum is σ = 262310400. Its totient is φ = 61838592.

The previous prime is 131766671. The next prime is 131766763. The reversal of 131766728 is 827667131.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

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, 58601 + ... + 60807.

It is an arithmetic number, because the mean of its divisors is an integer number (8197200).

Almost surely, 2^131766728 is an apocalyptic number.

It is an amenable number.

131766728 is a deficient number, since it is larger than the sum of its proper divisors (130543672).

131766728 is a wasteful number, since it uses less digits than its factorization.

131766728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2669 (or 2665 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 131766728 is about 11478.9689432457. The cubic root of 131766728 is about 508.8642263141.

The spelling of 131766728 in words is "one hundred thirty-one million, seven hundred sixty-six thousand, seven hundred twenty-eight".