64755240 has 64 divisors (see below), whose sum is σ = 211930560. Its totient is φ = 15697920.

The previous prime is 64755233. The next prime is 64755247. The reversal of 64755240 is 4255746.

It is an interprime number because it is at equal distance from previous prime (64755233) and next prime (64755247).

It is a super-2 number, since 2×64755240² = 8386482214915200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (64755247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23209 + ... + 25848.

It is an arithmetic number, because the mean of its divisors is an integer number (3311415).

Almost surely, 2^64755240 is an apocalyptic number.

64755240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64755240 is an abundant number, since it is smaller than the sum of its proper divisors (147175320).

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

64755240 is a wasteful number, since it uses less digits than its factorization.

64755240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49082 (or 49078 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 64755240 is about 8047.0640608858. The cubic root of 64755240 is about 401.5672678253.

The spelling of 64755240 in words is "sixty-four million, seven hundred fifty-five thousand, two hundred forty".