64740456 has 96 divisors (see below), whose sum is σ = 195829920. Its totient is φ = 19152000.

The previous prime is 64740451. The next prime is 64740509. The reversal of 64740456 is 65404746.

64740456 is a `hidden beast` number, since 647 + 4 + 0 + 4 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 64740456.

It is not an unprimeable number, because it can be changed into a prime (64740451) 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, 33106 + ... + 35006.

It is an arithmetic number, because the mean of its divisors is an integer number (2039895).

Almost surely, 2^64740456 is an apocalyptic number.

64740456 is a gapful number since it is divisible by the number (66) 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 64740456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97914960).

64740456 is an abundant number, since it is smaller than the sum of its proper divisors (131089464).

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

64740456 is a wasteful number, since it uses less digits than its factorization.

64740456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967 (or 1960 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 64740456 is about 8046.1454125563. The cubic root of 64740456 is about 401.5367054474.

The spelling of 64740456 in words is "sixty-four million, seven hundred forty thousand, four hundred fifty-six".