56229640 has 32 divisors (see below), whose sum is σ = 129939480. Its totient is φ = 21883392.

The previous prime is 56229587. The next prime is 56229643. The reversal of 56229640 is 4692265.

It can be written as a sum of positive squares in 4 ways, for example, as 40373316 + 15856324 = 6354^2 + 3982^2 .

It is a super-3 number, since 3×56229640³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56229596 and 56229605.

It is not an unprimeable number, because it can be changed into a prime (56229643) 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, 17517 + ... + 20476.

Almost surely, 2^56229640 is an apocalyptic number.

It is an amenable number.

56229640 is an abundant number, since it is smaller than the sum of its proper divisors (73709840).

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

56229640 is a wasteful number, since it uses less digits than its factorization.

56229640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38041 (or 38037 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 56229640 is about 7498.6425438208. The cubic root of 56229640 is about 383.1084822921.

The spelling of 56229640 in words is "fifty-six million, two hundred twenty-nine thousand, six hundred forty".