61172928 has 56 divisors (see below), whose sum is σ = 179842160. Its totient is φ = 20390400.

The previous prime is 61172899. The next prime is 61172933. The reversal of 61172928 is 82927116.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 61172892 and 61172901.

It is a congruent number.

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, 15973 + ... + 19428.

Almost surely, 2^61172928 is an apocalyptic number.

It is an amenable number.

61172928 is an abundant number, since it is smaller than the sum of its proper divisors (118669232).

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

61172928 is a wasteful number, since it uses less digits than its factorization.

61172928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35422 (or 35406 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 61172928 is about 7821.3124218382. The cubic root of 61172928 is about 394.0213512784.

It can be divided in two parts, 6117 and 2928, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 61172928 in words is "sixty-one million, one hundred seventy-two thousand, nine hundred twenty-eight".