64884930 has 64 divisors (see below), whose sum is σ = 170667648. Its totient is φ = 15656960.

The previous prime is 64884929. The next prime is 64884931. The reversal of 64884930 is 3948846.

It is an interprime number because it is at equal distance from previous prime (64884929) and next prime (64884931).

It is a super-2 number, since 2×64884930² = 8420108282209800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64884931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116212 + ... + 116768.

It is an arithmetic number, because the mean of its divisors is an integer number (2666682).

Almost surely, 2^64884930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64884930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85333824).

64884930 is an abundant number, since it is smaller than the sum of its proper divisors (105782718).

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

64884930 is a wasteful number, since it uses less digits than its factorization.

64884930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931.

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 64884930 is about 8055.1182486665. The cubic root of 64884930 is about 401.8351716529.

The spelling of 64884930 in words is "sixty-four million, eight hundred eighty-four thousand, nine hundred thirty".