64457340 has 24 divisors (see below), whose sum is σ = 180480720. Its totient is φ = 17188608.

The previous prime is 64457333. The next prime is 64457359. The reversal of 64457340 is 4375446.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537085 + ... + 537204.

It is an arithmetic number, because the mean of its divisors is an integer number (7520030).

Almost surely, 2^64457340 is an apocalyptic number.

64457340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64457340 is an abundant number, since it is smaller than the sum of its proper divisors (116023380).

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

64457340 is a wasteful number, since it uses less digits than its factorization.

64457340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074301 (or 1074299 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 33.

The square root of 64457340 is about 8028.5328672180. The cubic root of 64457340 is about 400.9505311040.

The spelling of 64457340 in words is "sixty-four million, four hundred fifty-seven thousand, three hundred forty".