64642374 has 48 divisors (see below), whose sum is σ = 151587072. Its totient is φ = 20607048.

The previous prime is 64642321. The next prime is 64642379. The reversal of 64642374 is 47324646.

64642374 is a `hidden beast` number, since 6 + 4 + 642 + 3 + 7 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64642379) 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, 8287 + ... + 14069.

It is an arithmetic number, because the mean of its divisors is an integer number (3158064).

Almost surely, 2^64642374 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64642374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75793536).

64642374 is an abundant number, since it is smaller than the sum of its proper divisors (86944698).

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

64642374 is a wasteful number, since it uses less digits than its factorization.

64642374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5823 (or 5811 counting only the distinct ones).

The product of its digits is 96768, while the sum is 36.

The square root of 64642374 is about 8040.0481341843. The cubic root of 64642374 is about 401.3338264901. Note that the first 3 decimals are identical.

The spelling of 64642374 in words is "sixty-four million, six hundred forty-two thousand, three hundred seventy-four".