64812258 has 64 divisors (see below), whose sum is σ = 169943040. Its totient is φ = 17917200.

The previous prime is 64812257. The next prime is 64812281. The reversal of 64812258 is 85221846.

64812258 is a `hidden beast` number, since 648 + 1 + 2 + 2 + 5 + 8 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (64812257) 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, 8953 + ... + 14483.

It is an arithmetic number, because the mean of its divisors is an integer number (2655360).

Almost surely, 2^64812258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64812258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84971520).

64812258 is an abundant number, since it is smaller than the sum of its proper divisors (105130782).

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

64812258 is a wasteful number, since it uses less digits than its factorization.

64812258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580 (or 5574 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 64812258 is about 8050.6060641420. The cubic root of 64812258 is about 401.6850953324.

The spelling of 64812258 in words is "sixty-four million, eight hundred twelve thousand, two hundred fifty-eight".