64584240 has 160 divisors (see below), whose sum is σ = 235223040. Its totient is φ = 14349312.

The previous prime is 64584137. The next prime is 64584259. The reversal of 64584240 is 4248546.

It is a super-2 number, since 2×64584240² = 8342248112755200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61641 + ... + 62679.

It is an arithmetic number, because the mean of its divisors is an integer number (1470144).

Almost surely, 2^64584240 is an apocalyptic number.

64584240 is a gapful number since it is divisible by the number (60) 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 64584240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117611520).

64584240 is an abundant number, since it is smaller than the sum of its proper divisors (170638800).

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

64584240 is a wasteful number, since it uses less digits than its factorization.

64584240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099 (or 1093 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 64584240 is about 8036.4320441350. The cubic root of 64584240 is about 401.2134816000.

The spelling of 64584240 in words is "sixty-four million, five hundred eighty-four thousand, two hundred forty".