56172402 has 96 divisors (see below), whose sum is σ = 144930240. Its totient is φ = 15500160.

The previous prime is 56172377. The next prime is 56172427. The reversal of 56172402 is 20427165.

56172402 is a `hidden beast` number, since 5 + 617 + 2 + 40 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (56172377) and next prime (56172427).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 357708 + ... + 357864.

It is an arithmetic number, because the mean of its divisors is an integer number (1509690).

Almost surely, 2^56172402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56172402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72465120).

56172402 is an abundant number, since it is smaller than the sum of its proper divisors (88757838).

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

56172402 is a wasteful number, since it uses less digits than its factorization.

56172402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 56172402 is about 7494.8250146351. The cubic root of 56172402 is about 382.9784452508.

Adding to 56172402 its reverse (20427165), we get a palindrome (76599567).

The spelling of 56172402 in words is "fifty-six million, one hundred seventy-two thousand, four hundred two".