64884240 has 400 divisors, whose sum is σ = 259269120. Its totient is φ = 14929920.

The previous prime is 64884229. The next prime is 64884251. The reversal of 64884240 is 4248846.

64884240 is a `hidden beast` number, since 648 + 8 + 4 + 2 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (64884229) and next prime (64884251).

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

It is a junction number, because it is equal to n+sod(n) for n = 64884195 and 64884204.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2093025 + ... + 2093055.

Almost surely, 2^64884240 is an apocalyptic number.

64884240 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 64884240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129634560).

64884240 is an abundant number, since it is smaller than the sum of its proper divisors (194384880).

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

64884240 is a wasteful number, since it uses less digits than its factorization.

64884240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The square root of 64884240 is about 8055.0754186413. The cubic root of 64884240 is about 401.8337472480.

The spelling of 64884240 in words is "sixty-four million, eight hundred eighty-four thousand, two hundred forty".