64142764 has 36 divisors (see below), whose sum is σ = 132394584. Its totient is φ = 27107136.

The previous prime is 64142761. The next prime is 64142797. The reversal of 64142764 is 46724146.

It is a super-2 number, since 2×64142764² = 8228588347119392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64142761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12067 + ... + 16549.

Almost surely, 2^64142764 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 64142764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66197292).

64142764 is an abundant number, since it is smaller than the sum of its proper divisors (68251820).

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

64142764 is a wasteful number, since it uses less digits than its factorization.

64142764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4574 (or 4565 counting only the distinct ones).

The product of its digits is 32256, while the sum is 34.

The square root of 64142764 is about 8008.9177795755. The cubic root of 64142764 is about 400.2972041196.

The spelling of 64142764 in words is "sixty-four million, one hundred forty-two thousand, seven hundred sixty-four".