61995940 has 24 divisors (see below), whose sum is σ = 137850552. Its totient is φ = 23339520.

The previous prime is 61995931. The next prime is 61995943. The reversal of 61995940 is 4959916.

It can be written as a sum of positive squares in 4 ways, for example, as 1871424 + 60124516 = 1368^2 + 7754^2 .

It is not an unprimeable number, because it can be changed into a prime (61995943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90831 + ... + 91510.

It is an arithmetic number, because the mean of its divisors is an integer number (5743773).

Almost surely, 2^61995940 is an apocalyptic number.

It is an amenable number.

61995940 is an abundant number, since it is smaller than the sum of its proper divisors (75854612).

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

61995940 is a wasteful number, since it uses less digits than its factorization.

61995940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182367 (or 182365 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 61995940 is about 7873.7500595333. The cubic root of 61995940 is about 395.7805215107.

The spelling of 61995940 in words is "sixty-one million, nine hundred ninety-five thousand, nine hundred forty".