64249240 has 32 divisors (see below), whose sum is σ = 157703760. Its totient is φ = 23363200.

The previous prime is 64249219. The next prime is 64249253. The reversal of 64249240 is 4294246.

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, 72571 + ... + 73450.

Almost surely, 2^64249240 is an apocalyptic number.

It is an amenable number.

64249240 is an abundant number, since it is smaller than the sum of its proper divisors (93454520).

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

64249240 is a wasteful number, since it uses less digits than its factorization.

64249240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146043 (or 146039 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 64249240 is about 8015.5623633030. The cubic root of 64249240 is about 400.5185774032.

The spelling of 64249240 in words is "sixty-four million, two hundred forty-nine thousand, two hundred forty".