428975507 has 4 divisors (see below), whose sum is σ = 447626640. Its totient is φ = 410324376.

The previous prime is 428975431. The next prime is 428975509. The reversal of 428975507 is 705579824.

It is a happy number.

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 428975507 - 2²⁶ = 361866643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428975509) 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, 9325532 + ... + 9325577.

It is an arithmetic number, because the mean of its divisors is an integer number (111906660).

Almost surely, 2^428975507 is an apocalyptic number.

428975507 is a deficient number, since it is larger than the sum of its proper divisors (18651133).

428975507 is a wasteful number, since it uses less digits than its factorization.

428975507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18651132.

The product of its (nonzero) digits is 705600, while the sum is 47.

The square root of 428975507 is about 20711.7239021768. The cubic root of 428975507 is about 754.1843197290.

The spelling of 428975507 in words is "four hundred twenty-eight million, nine hundred seventy-five thousand, five hundred seven".