126579840 has 64 divisors (see below), whose sum is σ = 403479360. Its totient is φ = 33754112.

The previous prime is 126579829. The next prime is 126579889. The reversal of 126579840 is 48975621.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 126579792 and 126579801.

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, 31044 + ... + 34883.

It is an arithmetic number, because the mean of its divisors is an integer number (6304365).

Almost surely, 2^126579840 is an apocalyptic number.

126579840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126579840 is an abundant number, since it is smaller than the sum of its proper divisors (276899520).

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

126579840 is an equidigital number, since it uses as much as digits as its factorization.

126579840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65949 (or 65937 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 126579840 is about 11250.7706402717. The cubic root of 126579840 is about 502.0976408328.

The spelling of 126579840 in words is "one hundred twenty-six million, five hundred seventy-nine thousand, eight hundred forty".