61528572 has 72 divisors (see below), whose sum is σ = 184352896. Its totient is φ = 17577648.

The previous prime is 61528501. The next prime is 61528591. The reversal of 61528572 is 27582516.

It is a happy number.

61528572 is a `hidden beast` number, since 61 + 5 + 28 + 572 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2283 + ... + 11325.

Almost surely, 2^61528572 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 61528572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92176448).

61528572 is an abundant number, since it is smaller than the sum of its proper divisors (122824324).

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

61528572 is a wasteful number, since it uses less digits than its factorization.

61528572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9069 (or 9055 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 61528572 is about 7844.0150433308. The cubic root of 61528572 is about 394.7834565919.

The spelling of 61528572 in words is "sixty-one million, five hundred twenty-eight thousand, five hundred seventy-two".