42928657 has 4 divisors (see below), whose sum is σ = 45188080. Its totient is φ = 40669236.

The previous prime is 42928643. The next prime is 42928661. The reversal of 42928657 is 75682924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42928657 - 2¹⁵ = 42895889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42928637) 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, 1129683 + ... + 1129720.

It is an arithmetic number, because the mean of its divisors is an integer number (11297020).

Almost surely, 2^42928657 is an apocalyptic number.

It is an amenable number.

42928657 is a deficient number, since it is larger than the sum of its proper divisors (2259423).

42928657 is a wasteful number, since it uses less digits than its factorization.

42928657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2259422.

The product of its digits is 241920, while the sum is 43.

The square root of 42928657 is about 6551.9964133079. The cubic root of 42928657 is about 350.1459445771.

The spelling of 42928657 in words is "forty-two million, nine hundred twenty-eight thousand, six hundred fifty-seven".