61628772 has 12 divisors (see below), whose sum is σ = 143800496. Its totient is φ = 20542920.

The previous prime is 61628747. The next prime is 61628773. The reversal of 61628772 is 27782616.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 61628772.

It is not an unprimeable number, because it can be changed into a prime (61628773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2567854 + ... + 2567877.

Almost surely, 2^61628772 is an apocalyptic number.

It is an amenable number.

61628772 is an abundant number, since it is smaller than the sum of its proper divisors (82171724).

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

61628772 is a wasteful number, since it uses less digits than its factorization.

61628772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135738 (or 5135736 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 61628772 is about 7850.3994802812. The cubic root of 61628772 is about 394.9976435260.

The spelling of 61628772 in words is "sixty-one million, six hundred twenty-eight thousand, seven hundred seventy-two".