64422140 has 12 divisors (see below), whose sum is σ = 135286536. Its totient is φ = 25768848.

The previous prime is 64422139. The next prime is 64422151. The reversal of 64422140 is 4122446.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610534 + ... + 1610573.

It is an arithmetic number, because the mean of its divisors is an integer number (11273878).

Almost surely, 2^64422140 is an apocalyptic number.

It is an amenable number.

64422140 is an abundant number, since it is smaller than the sum of its proper divisors (70864396).

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

64422140 is a wasteful number, since it uses less digits than its factorization.

64422140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221116 (or 3221114 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 64422140 is about 8026.3403865024. The cubic root of 64422140 is about 400.8775317705.

Adding to 64422140 its reverse (4122446), we get a palindrome (68544586).

The spelling of 64422140 in words is "sixty-four million, four hundred twenty-two thousand, one hundred forty".