61964920 has 32 divisors (see below), whose sum is σ = 139716720. Its totient is φ = 24733440.

The previous prime is 61964911. The next prime is 61964989. The reversal of 61964920 is 2946916.

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 self number, because there is not a number n which added to its sum of digits gives 61964920.

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, 21484 + ... + 24196.

Almost surely, 2^61964920 is an apocalyptic number.

It is an amenable number.

61964920 is an abundant number, since it is smaller than the sum of its proper divisors (77751800).

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

61964920 is a wasteful number, since it uses less digits than its factorization.

61964920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3295 (or 3291 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 61964920 is about 7871.7799766000. The cubic root of 61964920 is about 395.7145001982.

The spelling of 61964920 in words is "sixty-one million, nine hundred sixty-four thousand, nine hundred twenty".