64492520 has 64 divisors (see below), whose sum is σ = 153090000. Its totient is φ = 24414208.

The previous prime is 64492511. The next prime is 64492531. The reversal of 64492520 is 2529446.

64492520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 50098084 + 14394436 = 7078^2 + 3794^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60956 + ... + 62004.

Almost surely, 2^64492520 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 64492520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76545000).

64492520 is an abundant number, since it is smaller than the sum of its proper divisors (88597480).

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

64492520 is a wasteful number, since it uses less digits than its factorization.

64492520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 64492520 is about 8030.7235041433. The cubic root of 64492520 is about 401.0234624116.

The spelling of 64492520 in words is "sixty-four million, four hundred ninety-two thousand, five hundred twenty".