64272528 has 120 divisors (see below), whose sum is σ = 190293376. Its totient is φ = 20995200.

The previous prime is 64272473. The next prime is 64272539. The reversal of 64272528 is 82527246.

64272528 is a `hidden beast` number, since 64 + 2 + 72 + 528 = 666.

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 = 64272492 and 64272501.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237033 + ... + 237303.

Almost surely, 2^64272528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64272528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95146688).

64272528 is an abundant number, since it is smaller than the sum of its proper divisors (126020848).

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

64272528 is a wasteful number, since it uses less digits than its factorization.

64272528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355 (or 337 counting only the distinct ones).

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

The square root of 64272528 is about 8017.0149058113. The cubic root of 64272528 is about 400.5669626703.

The spelling of 64272528 in words is "sixty-four million, two hundred seventy-two thousand, five hundred twenty-eight".