64685952 has 160 divisors (see below), whose sum is σ = 204383520. Its totient is φ = 20238336.

The previous prime is 64685939. The next prime is 64685977. The reversal of 64685952 is 25958646.

It is a super-2 number, since 2×64685952² = 8368544772292608, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64685898 and 64685907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 176073 + ... + 176439.

It is an arithmetic number, because the mean of its divisors is an integer number (1277397).

Almost surely, 2^64685952 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 64685952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102191760).

64685952 is an abundant number, since it is smaller than the sum of its proper divisors (139697568).

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

64685952 is a wasteful number, since it uses less digits than its factorization.

64685952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 389 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 64685952 is about 8042.7577360008. The cubic root of 64685952 is about 401.4239912732.

The spelling of 64685952 in words is "sixty-four million, six hundred eighty-five thousand, nine hundred fifty-two".