126992640 has 72 divisors (see below), whose sum is σ = 405595008. Its totient is φ = 33863680.

The previous prime is 126992633. The next prime is 126992687. The reversal of 126992640 is 46299621.

It is a super-2 number, since 2×126992640² = 32254261228339200, which contains 22 as substring.

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, 12696 + ... + 20375.

It is an arithmetic number, because the mean of its divisors is an integer number (5633264).

Almost surely, 2^126992640 is an apocalyptic number.

126992640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126992640 is an abundant number, since it is smaller than the sum of its proper divisors (278602368).

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

126992640 is an equidigital number, since it uses as much as digits as its factorization.

126992640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33095 (or 33081 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 126992640 is about 11269.1011176580. The cubic root of 126992640 is about 502.6428593099.

The spelling of 126992640 in words is "one hundred twenty-six million, nine hundred ninety-two thousand, six hundred forty".