428308707 has 16 divisors (see below), whose sum is σ = 594784512. Its totient is φ = 273903840.

The previous prime is 428308703. The next prime is 428308753. The reversal of 428308707 is 707803824.

It is not a de Polignac number, because 428308707 - 2² = 428308703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428308703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19293 + ... + 35054.

It is an arithmetic number, because the mean of its divisors is an integer number (37174032).

Almost surely, 2^428308707 is an apocalyptic number.

428308707 is a deficient number, since it is larger than the sum of its proper divisors (166475805).

428308707 is a wasteful number, since it uses less digits than its factorization.

428308707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54458.

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 428308707 is about 20695.6204787390. The cubic root of 428308707 is about 753.7933487716.

The spelling of 428308707 in words is "four hundred twenty-eight million, three hundred eight thousand, seven hundred seven".