61423872 has 36 divisors (see below), whose sum is σ = 163479120. Its totient is φ = 20474368.

The previous prime is 61423871. The next prime is 61423883. The reversal of 61423872 is 27832416.

It is not an unprimeable number, because it can be changed into a prime (61423871) 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, 39222 + ... + 40757.

Almost surely, 2^61423872 is an apocalyptic number.

It is an amenable number.

61423872 is an abundant number, since it is smaller than the sum of its proper divisors (102055248).

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

61423872 is an equidigital number, since it uses as much as digits as its factorization.

61423872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79998 (or 79984 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 61423872 is about 7837.3383236913. The cubic root of 61423872 is about 394.5594019023.

The spelling of 61423872 in words is "sixty-one million, four hundred twenty-three thousand, eight hundred seventy-two".