64378722 has 16 divisors (see below), whose sum is σ = 129093120. Its totient is φ = 21403632.

The previous prime is 64378709. The next prime is 64378747. The reversal of 64378722 is 22787346.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11458 + ... + 16125.

It is an arithmetic number, because the mean of its divisors is an integer number (8068320).

Almost surely, 2^64378722 is an apocalyptic number.

64378722 is an abundant number, since it is smaller than the sum of its proper divisors (64714398).

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

64378722 is a wasteful number, since it uses less digits than its factorization.

64378722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27977.

The product of its digits is 112896, while the sum is 39.

The square root of 64378722 is about 8023.6352110499. The cubic root of 64378722 is about 400.7874529441.

The spelling of 64378722 in words is "sixty-four million, three hundred seventy-eight thousand, seven hundred twenty-two".