61720204 has 36 divisors (see below), whose sum is σ = 135315264. Its totient is φ = 24415776.

The previous prime is 61720187. The next prime is 61720213. The reversal of 61720204 is 40202716.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9564 + ... + 14659.

Almost surely, 2^61720204 is an apocalyptic number.

It is an amenable number.

61720204 is an abundant number, since it is smaller than the sum of its proper divisors (73595060).

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

61720204 is a wasteful number, since it uses less digits than its factorization.

61720204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24254 (or 24245 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 61720204 is about 7856.2207199136. The cubic root of 61720204 is about 395.1928855527.

The spelling of 61720204 in words is "sixty-one million, seven hundred twenty thousand, two hundred four".