56172340 has 24 divisors (see below), whose sum is σ = 134813952. Its totient is φ = 19259040.

The previous prime is 56172323. The next prime is 56172343. The reversal of 56172340 is 4327165.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 56172299 and 56172308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56172343) 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, 200476 + ... + 200755.

It is an arithmetic number, because the mean of its divisors is an integer number (5617248).

Almost surely, 2^56172340 is an apocalyptic number.

It is an amenable number.

56172340 is an abundant number, since it is smaller than the sum of its proper divisors (78641612).

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

56172340 is a wasteful number, since it uses less digits than its factorization.

56172340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401247 (or 401245 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 56172340 is about 7494.8208784467. The cubic root of 56172340 is about 382.9783043472.

The spelling of 56172340 in words is "fifty-six million, one hundred seventy-two thousand, three hundred forty".