126999880 has 32 divisors (see below), whose sum is σ = 326571840. Its totient is φ = 43542720.

The previous prime is 126999863. The next prime is 126999881. The reversal of 126999880 is 88999621.

It is a super-2 number, since 2×126999880² = 32257939040028800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126999881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226506 + ... + 227065.

It is an arithmetic number, because the mean of its divisors is an integer number (10205370).

Almost surely, 2^126999880 is an apocalyptic number.

126999880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126999880 is an abundant number, since it is smaller than the sum of its proper divisors (199571960).

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

126999880 is a wasteful number, since it uses less digits than its factorization.

126999880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453589 (or 453585 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 52.

The square root of 126999880 is about 11269.4223454443. The cubic root of 126999880 is about 502.6524112155.

The spelling of 126999880 in words is "one hundred twenty-six million, nine hundred ninety-nine thousand, eight hundred eighty".