64428107 has 4 divisors (see below), whose sum is σ = 67819080. Its totient is φ = 61037136.

The previous prime is 64428043. The next prime is 64428127. The reversal of 64428107 is 70182446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64428107 - 2⁶ = 64428043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64428127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1695458 + ... + 1695495.

It is an arithmetic number, because the mean of its divisors is an integer number (16954770).

Almost surely, 2^64428107 is an apocalyptic number.

64428107 is a deficient number, since it is larger than the sum of its proper divisors (3390973).

64428107 is a wasteful number, since it uses less digits than its factorization.

64428107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3390972.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 64428107 is about 8026.7120915104. The cubic root of 64428107 is about 400.8899082733.

The spelling of 64428107 in words is "sixty-four million, four hundred twenty-eight thousand, one hundred seven".