64142394 has 48 divisors (see below), whose sum is σ = 138459456. Its totient is φ = 19801600.

The previous prime is 64142387. The next prime is 64142401. The reversal of 64142394 is 49324146.

It is an interprime number because it is at equal distance from previous prime (64142387) and next prime (64142401).

It is a super-2 number, since 2×64142394² = 8228493416102472, which contains 22 as substring.

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, 122854 + ... + 123374.

It is an arithmetic number, because the mean of its divisors is an integer number (2884572).

Almost surely, 2^64142394 is an apocalyptic number.

64142394 is an abundant number, since it is smaller than the sum of its proper divisors (74317062).

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

64142394 is a wasteful number, since it uses less digits than its factorization.

64142394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 614 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 64142394 is about 8008.8946802914. The cubic root of 64142394 is about 400.2964344290.

The spelling of 64142394 in words is "sixty-four million, one hundred forty-two thousand, three hundred ninety-four".