64309090 has 16 divisors (see below), whose sum is σ = 115888320. Its totient is φ = 25694320.

The previous prime is 64309061. The next prime is 64309093. The reversal of 64309090 is 9090346.

64309090 is a modest number, since divided by 9090 gives 6430 as remainder.

It is not an unprimeable number, because it can be changed into a prime (64309093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7035 + ... + 13345.

It is an arithmetic number, because the mean of its divisors is an integer number (7243020).

Almost surely, 2^64309090 is an apocalyptic number.

64309090 is a deficient number, since it is larger than the sum of its proper divisors (51579230).

64309090 is a wasteful number, since it uses less digits than its factorization.

64309090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7337.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 64309090 is about 8019.2948567814. The cubic root of 64309090 is about 400.6429036337.

The spelling of 64309090 in words is "sixty-four million, three hundred nine thousand, ninety".