428723986 has 48 divisors (see below), whose sum is σ = 717230592. Its totient is φ = 191923200.

The previous prime is 428723983. The next prime is 428723987. The reversal of 428723986 is 689327824.

It is not an unprimeable number, because it can be changed into a prime (428723983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1272010 + ... + 1272346.

It is an arithmetic number, because the mean of its divisors is an integer number (14942304).

Almost surely, 2^428723986 is an apocalyptic number.

428723986 is a deficient number, since it is larger than the sum of its proper divisors (288506606).

428723986 is a wasteful number, since it uses less digits than its factorization.

428723986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475 (or 458 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 49.

The square root of 428723986 is about 20705.6510643834. The cubic root of 428723986 is about 754.0368907363.

The spelling of 428723986 in words is "four hundred twenty-eight million, seven hundred twenty-three thousand, nine hundred eighty-six".