64913730 has 48 divisors (see below), whose sum is σ = 181232640. Its totient is φ = 14837088.

The previous prime is 64913729. The next prime is 64913731. The reversal of 64913730 is 3731946.

It is an interprime number because it is at equal distance from previous prime (64913729) and next prime (64913731).

It is a junction number, because it is equal to n+sod(n) for n = 64913691 and 64913700.

It is not an unprimeable number, because it can be changed into a prime (64913731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20610 + ... + 23549.

It is an arithmetic number, because the mean of its divisors is an integer number (3775680).

Almost surely, 2^64913730 is an apocalyptic number.

64913730 is an abundant number, since it is smaller than the sum of its proper divisors (116318910).

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

64913730 is a wasteful number, since it uses less digits than its factorization.

64913730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44183 (or 44176 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 64913730 is about 8056.9057335928. The cubic root of 64913730 is about 401.8946160731.

The spelling of 64913730 in words is "sixty-four million, nine hundred thirteen thousand, seven hundred thirty".