428163907 has 4 divisors (see below), whose sum is σ = 434029240. Its totient is φ = 422298576.

The previous prime is 428163899. The next prime is 428163913. The reversal of 428163907 is 709361824.

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

It is not a de Polignac number, because 428163907 - 2³ = 428163899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428163907.

It is not an unprimeable number, because it can be changed into a prime (428163977) 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, 2932557 + ... + 2932702.

It is an arithmetic number, because the mean of its divisors is an integer number (108507310).

Almost surely, 2^428163907 is an apocalyptic number.

428163907 is a deficient number, since it is larger than the sum of its proper divisors (5865333).

428163907 is an equidigital number, since it uses as much as digits as its factorization.

428163907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5865332.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 428163907 is about 20692.1218583305. The cubic root of 428163907 is about 753.7083932418.

The spelling of 428163907 in words is "four hundred twenty-eight million, one hundred sixty-three thousand, nine hundred seven".