64858409 has 12 divisors (see below), whose sum is σ = 82307088. Its totient is φ = 50538600.

The previous prime is 64858399. The next prime is 64858411. The reversal of 64858409 is 90485846.

It is a happy number.

It is not a de Polignac number, because 64858409 - 2⁴ = 64858393 is a prime.

It is a super-2 number, since 2×64858409² = 8413226436022562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64858409.

It is not an unprimeable number, because it can be changed into a prime (64858439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59627 + ... + 60704.

It is an arithmetic number, because the mean of its divisors is an integer number (6858924).

Almost surely, 2^64858409 is an apocalyptic number.

It is an amenable number.

64858409 is a deficient number, since it is larger than the sum of its proper divisors (17448679).

64858409 is a wasteful number, since it uses less digits than its factorization.

64858409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120356 (or 120349 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 64858409 is about 8053.4718600117. The cubic root of 64858409 is about 401.7804156261.

The spelling of 64858409 in words is "sixty-four million, eight hundred fifty-eight thousand, four hundred nine".