56129140 has 12 divisors (see below), whose sum is σ = 117871236. Its totient is φ = 22451648.

The previous prime is 56129137. The next prime is 56129153. The reversal of 56129140 is 4192165.

It can be written as a sum of positive squares in 2 ways, for example, as 36433296 + 19695844 = 6036^2 + 4438^2 .

It is a junction number, because it is equal to n+sod(n) for n = 56129099 and 56129108.

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, 1403209 + ... + 1403248.

It is an arithmetic number, because the mean of its divisors is an integer number (9822603).

Almost surely, 2^56129140 is an apocalyptic number.

It is an amenable number.

56129140 is an abundant number, since it is smaller than the sum of its proper divisors (61742096).

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

56129140 is a wasteful number, since it uses less digits than its factorization.

56129140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806466 (or 2806464 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 56129140 is about 7491.9383339694. The cubic root of 56129140 is about 382.8801011755.

The spelling of 56129140 in words is "fifty-six million, one hundred twenty-nine thousand, one hundred forty".