61881924 has 24 divisors (see below), whose sum is σ = 155498560. Its totient is φ = 19040544.

The previous prime is 61881901. The next prime is 61881931. The reversal of 61881924 is 42918816.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a nialpdrome in base 13.

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, 198184 + ... + 198495.

Almost surely, 2^61881924 is an apocalyptic number.

It is an amenable number.

61881924 is an abundant number, since it is smaller than the sum of its proper divisors (93616636).

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

61881924 is a wasteful number, since it uses less digits than its factorization.

61881924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396699 (or 396697 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 61881924 is about 7866.5064672954. The cubic root of 61881924 is about 395.5377475302.

The spelling of 61881924 in words is "sixty-one million, eight hundred eighty-one thousand, nine hundred twenty-four".