64428895 has 16 divisors (see below), whose sum is σ = 82194048. Its totient is φ = 48314880.

The previous prime is 64428883. The next prime is 64428967. The reversal of 64428895 is 59882446.

It is not a de Polignac number, because 64428895 - 2¹³ = 64420703 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21637 + ... + 24433.

It is an arithmetic number, because the mean of its divisors is an integer number (5137128).

Almost surely, 2^64428895 is an apocalyptic number.

64428895 is a deficient number, since it is larger than the sum of its proper divisors (17765153).

64428895 is a wasteful number, since it uses less digits than its factorization.

64428895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090.

The product of its digits is 552960, while the sum is 46.

The square root of 64428895 is about 8026.7611774613. The cubic root of 64428895 is about 400.8915426529.

The spelling of 64428895 in words is "sixty-four million, four hundred twenty-eight thousand, eight hundred ninety-five".