428591916 has 18 divisors (see below), whose sum is σ = 1083385212. Its totient is φ = 142863960.

The previous prime is 428591869. The next prime is 428591927. The reversal of 428591916 is 619195824.

428591916 is a `hidden beast` number, since 42 + 8 + 591 + 9 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5952630 + ... + 5952701.

Almost surely, 2^428591916 is an apocalyptic number.

It is an amenable number.

428591916 is an abundant number, since it is smaller than the sum of its proper divisors (654793296).

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

428591916 is a wasteful number, since it uses less digits than its factorization.

428591916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11905341 (or 11905336 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 428591916 is about 20702.4615927672. The cubic root of 428591916 is about 753.9594548389.

It can be divided in two parts, 42 and 8591916, that added together give a palindrome (8591958).

The spelling of 428591916 in words is "four hundred twenty-eight million, five hundred ninety-one thousand, nine hundred sixteen".