64138452 has 72 divisors (see below), whose sum is σ = 183284640. Its totient is φ = 17357760.

The previous prime is 64138447. The next prime is 64138483. The reversal of 64138452 is 25483146.

It is a super-2 number, since 2×64138452² = 8227482049912608, which contains 22 as substring.

It is a congruent number.

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, 8302 + ... + 14042.

It is an arithmetic number, because the mean of its divisors is an integer number (2545620).

Almost surely, 2^64138452 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 64138452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91642320).

64138452 is an abundant number, since it is smaller than the sum of its proper divisors (119146188).

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

64138452 is a wasteful number, since it uses less digits than its factorization.

64138452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5781 (or 5772 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 64138452 is about 8008.6485751343. The cubic root of 64138452 is about 400.2882339198.

It can be divided in two parts, 641 and 38452, that added together give a palindrome (39093).

The spelling of 64138452 in words is "sixty-four million, one hundred thirty-eight thousand, four hundred fifty-two".