61957868 has 12 divisors (see below), whose sum is σ = 123915792. Its totient is φ = 26553360.

The previous prime is 61957859. The next prime is 61957873. The reversal of 61957868 is 86875916.

It is a happy number.

61957868 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1106363 + ... + 1106418.

It is an arithmetic number, because the mean of its divisors is an integer number (10326316).

Almost surely, 2^61957868 is an apocalyptic number.

It is an amenable number.

61957868 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61957868 is a wasteful number, since it uses less digits than its factorization.

61957868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212792 (or 2212790 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 61957868 is about 7871.3320346686. The cubic root of 61957868 is about 395.6994880239.

The spelling of 61957868 in words is "sixty-one million, nine hundred fifty-seven thousand, eight hundred sixty-eight".