64239156 has 60 divisors (see below), whose sum is σ = 168722400. Its totient is φ = 21312720.

The previous prime is 64239151. The next prime is 64239157. The reversal of 64239156 is 65193246.

It is a happy number.

64239156 is a `hidden beast` number, since 642 + 3 + 9 + 1 + 5 + 6 = 666.

64239156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 64239156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64239151) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 106945 + ... + 107543.

It is an arithmetic number, because the mean of its divisors is an integer number (2812040).

Almost surely, 2^64239156 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 64239156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84361200).

64239156 is an abundant number, since it is smaller than the sum of its proper divisors (104483244).

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

64239156 is a wasteful number, since it uses less digits than its factorization.

64239156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946 (or 935 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 64239156 is about 8014.9333122616. The cubic root of 64239156 is about 400.4976223400.

The spelling of 64239156 in words is "sixty-four million, two hundred thirty-nine thousand, one hundred fifty-six".