64452780 has 288 divisors, whose sum is σ = 247564800. Its totient is φ = 13630464.

The previous prime is 64452733. The next prime is 64452809. The reversal of 64452780 is 8725446.

64452780 is a `hidden beast` number, since 644 + 5 + 2 + 7 + 8 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1092391 + ... + 1092449.

It is an arithmetic number, because the mean of its divisors is an integer number (859600).

Almost surely, 2^64452780 is an apocalyptic number.

64452780 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 64452780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123782400).

64452780 is an abundant number, since it is smaller than the sum of its proper divisors (183112020).

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

64452780 is a wasteful number, since it uses less digits than its factorization.

64452780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 64452780 is about 8028.2488750661. The cubic root of 64452780 is about 400.9410758708.

The spelling of 64452780 in words is "sixty-four million, four hundred fifty-two thousand, seven hundred eighty".