61880620 has 24 divisors (see below), whose sum is σ = 130118688. Its totient is φ = 24720000.

The previous prime is 61880617. The next prime is 61880633. The reversal of 61880620 is 2608816.

It is a super-2 number, since 2×61880620² = 7658422263168800, which contains 22 as substring.

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, 19120 + ... + 22120.

It is an arithmetic number, because the mean of its divisors is an integer number (5421612).

Almost surely, 2^61880620 is an apocalyptic number.

It is an amenable number.

61880620 is an abundant number, since it is smaller than the sum of its proper divisors (68238068).

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

61880620 is a wasteful number, since it uses less digits than its factorization.

61880620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4041 (or 4039 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 61880620 is about 7866.4235838149. The cubic root of 61880620 is about 395.5349692022.

It can be divided in two parts, 61880 and 620, that added together give a square (62500 = 250²).

The spelling of 61880620 in words is "sixty-one million, eight hundred eighty thousand, six hundred twenty".