61392880 has 40 divisors (see below), whose sum is σ = 143298864. Its totient is φ = 24460800.

The previous prime is 61392871. The next prime is 61392907. The reversal of 61392880 is 8829316.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

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, 21115 + ... + 23845.

Almost surely, 2^61392880 is an apocalyptic number.

It is an amenable number.

61392880 is an abundant number, since it is smaller than the sum of its proper divisors (81905984).

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

61392880 is a wasteful number, since it uses less digits than its factorization.

61392880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025 (or 3019 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 61392880 is about 7835.3608723530. The cubic root of 61392880 is about 394.4930311695.

It can be divided in two parts, 61 and 392880, that added together give a triangular number (392941 = T₈₈₆).

The spelling of 61392880 in words is "sixty-one million, three hundred ninety-two thousand, eight hundred eighty".