64642794 has 16 divisors (see below), whose sum is σ = 129868032. Its totient is φ = 21450528.

The previous prime is 64642771. The next prime is 64642829. The reversal of 64642794 is 49724646.

It is a super-2 number, since 2×64642794² = 8357381632252872, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22819 + ... + 25494.

It is an arithmetic number, because the mean of its divisors is an integer number (8116752).

Almost surely, 2^64642794 is an apocalyptic number.

64642794 is an abundant number, since it is smaller than the sum of its proper divisors (65225238).

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

64642794 is a wasteful number, since it uses less digits than its factorization.

64642794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48541.

The product of its digits is 290304, while the sum is 42.

The square root of 64642794 is about 8040.0742533885. The cubic root of 64642794 is about 401.3346956818.

The spelling of 64642794 in words is "sixty-four million, six hundred forty-two thousand, seven hundred ninety-four".