64390968 has 96 divisors (see below), whose sum is σ = 190719360. Its totient is φ = 19537920.

The previous prime is 64390957. The next prime is 64390973. The reversal of 64390968 is 86909346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37096 + ... + 38792.

It is an arithmetic number, because the mean of its divisors is an integer number (1986660).

Almost surely, 2^64390968 is an apocalyptic number.

64390968 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64390968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95359680).

64390968 is an abundant number, since it is smaller than the sum of its proper divisors (126328392).

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

64390968 is a wasteful number, since it uses less digits than its factorization.

64390968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757 (or 1750 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 64390968 is about 8024.3982951995. The cubic root of 64390968 is about 400.8128636793.

The spelling of 64390968 in words is "sixty-four million, three hundred ninety thousand, nine hundred sixty-eight".