618715428 has 24 divisors (see below), whose sum is σ = 1470909888. Its totient is φ = 202346976.

The previous prime is 618715397. The next prime is 618715457. The reversal of 618715428 is 824517816.

It is a self number, because there is not a number n which added to its sum of digits gives 618715428.

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, 485776 + ... + 487047.

It is an arithmetic number, because the mean of its divisors is an integer number (61287912).

Almost surely, 2^618715428 is an apocalyptic number.

It is an amenable number.

618715428 is an abundant number, since it is smaller than the sum of its proper divisors (852194460).

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

618715428 is a wasteful number, since it uses less digits than its factorization.

618715428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972883 (or 972881 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 618715428 is about 24873.9909946112. The cubic root of 618715428 is about 852.1125895425.

The spelling of 618715428 in words is "six hundred eighteen million, seven hundred fifteen thousand, four hundred twenty-eight".