428723604 has 30 divisors (see below), whose sum is σ = 1120769034. Its totient is φ = 142907760.

The previous prime is 428723587. The next prime is 428723621. The reversal of 428723604 is 406327824.

428723604 is a `hidden beast` number, since 4 + 28 + 7 + 23 + 604 = 666.

It is an interprime number because it is at equal distance from previous prime (428723587) and next prime (428723621).

It can be written as a sum of positive squares in only one way, i.e., 256064004 + 172659600 = 16002^2 + 13140^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 661287 + ... + 661934.

Almost surely, 2^428723604 is an apocalyptic number.

It is an amenable number.

428723604 is an abundant number, since it is smaller than the sum of its proper divisors (692045430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428723604 is a wasteful number, since it uses less digits than its factorization.

428723604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323237 (or 1323226 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 428723604 is about 20705.6418398465. The cubic root of 428723604 is about 754.0366667832.

The spelling of 428723604 in words is "four hundred twenty-eight million, seven hundred twenty-three thousand, six hundred four".