428038986 has 16 divisors (see below), whose sum is σ = 856418400. Its totient is φ = 142622928.

The previous prime is 428038957. The next prime is 428038999. The reversal of 428038986 is 689830824.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3945 + ... + 29523.

It is an arithmetic number, because the mean of its divisors is an integer number (53526150).

Almost surely, 2^428038986 is an apocalyptic number.

428038986 is an abundant number, since it is smaller than the sum of its proper divisors (428379414).

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

428038986 is a wasteful number, since it uses less digits than its factorization.

428038986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28373.

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 428038986 is about 20689.1030738406. The cubic root of 428038986 is about 753.6350855179.

The spelling of 428038986 in words is "four hundred twenty-eight million, thirty-eight thousand, nine hundred eighty-six".