64040370 has 64 divisors (see below), whose sum is σ = 158336640. Its totient is φ = 16570368.

The previous prime is 64040359. The next prime is 64040477. The reversal of 64040370 is 7304046.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64040370.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171504 + ... + 171876.

It is an arithmetic number, because the mean of its divisors is an integer number (2474010).

Almost surely, 2^64040370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64040370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79168320).

64040370 is an abundant number, since it is smaller than the sum of its proper divisors (94296270).

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

64040370 is a wasteful number, since it uses less digits than its factorization.

64040370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 64040370 is about 8002.5227272405. The cubic root of 64040370 is about 400.0840864891.

The spelling of 64040370 in words is "sixty-four million, forty thousand, three hundred seventy".