64961928 has 48 divisors (see below), whose sum is σ = 177231600. Its totient is φ = 21494880.

The previous prime is 64961881. The next prime is 64961977. The reversal of 64961928 is 82916946.

It is a happy number.

64961928 is a `hidden beast` number, since 6 + 4 + 9 + 619 + 28 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6763 + ... + 13253.

It is an arithmetic number, because the mean of its divisors is an integer number (3692325).

Almost surely, 2^64961928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64961928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88615800).

64961928 is an abundant number, since it is smaller than the sum of its proper divisors (112269672).

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

64961928 is a wasteful number, since it uses less digits than its factorization.

64961928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6642 (or 6635 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 64961928 is about 8059.8962772482. The cubic root of 64961928 is about 401.9940594652.

The spelling of 64961928 in words is "sixty-four million, nine hundred sixty-one thousand, nine hundred twenty-eight".