618916428 has 36 divisors (see below), whose sum is σ = 1684829328. Its totient is φ = 190435680.

The previous prime is 618916409. The next prime is 618916429. The reversal of 618916428 is 824619816.

618916428 is a `hidden beast` number, since 618 + 9 + 1 + 6 + 4 + 28 = 666.

618916428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (618916429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 660768 + ... + 661703.

Almost surely, 2^618916428 is an apocalyptic number.

It is an amenable number.

618916428 is an abundant number, since it is smaller than the sum of its proper divisors (1065912900).

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

618916428 is a wasteful number, since it uses less digits than its factorization.

618916428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322494 (or 1322489 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 618916428 is about 24878.0310314140. The cubic root of 618916428 is about 852.2048538689.

The spelling of 618916428 in words is "six hundred eighteen million, nine hundred sixteen thousand, four hundred twenty-eight".