64428671 has 8 divisors (see below), whose sum is σ = 66210144. Its totient is φ = 62657280.

The previous prime is 64428647. The next prime is 64428673. The reversal of 64428671 is 17682446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64428671 - 2¹⁴ = 64412287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64428673) 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, 11486 + ... + 16148.

It is an arithmetic number, because the mean of its divisors is an integer number (8276268).

Almost surely, 2^64428671 is an apocalyptic number.

64428671 is a deficient number, since it is larger than the sum of its proper divisors (1781473).

64428671 is a wasteful number, since it uses less digits than its factorization.

64428671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5041.

The product of its digits is 64512, while the sum is 38.

The square root of 64428671 is about 8026.7472241251. The cubic root of 64428671 is about 400.8910780590.

The spelling of 64428671 in words is "sixty-four million, four hundred twenty-eight thousand, six hundred seventy-one".