64413990 has 96 divisors (see below), whose sum is σ = 178214400. Its totient is φ = 16096320.

The previous prime is 64413953. The next prime is 64413997. The reversal of 64413990 is 9931446.

64413990 is a `hidden beast` number, since 644 + 1 + 3 + 9 + 9 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64413997) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 237555 + ... + 237825.

It is an arithmetic number, because the mean of its divisors is an integer number (1856400).

Almost surely, 2^64413990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64413990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89107200).

64413990 is an abundant number, since it is smaller than the sum of its proper divisors (113800410).

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

64413990 is a wasteful number, since it uses less digits than its factorization.

64413990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 64413990 is about 8025.8326670820. The cubic root of 64413990 is about 400.8606261452.

The spelling of 64413990 in words is "sixty-four million, four hundred thirteen thousand, nine hundred ninety".