618394878 has 32 divisors (see below), whose sum is σ = 1375284000. Its totient is φ = 205970688.

The previous prime is 618394867. The next prime is 618394879. The reversal of 618394878 is 878493816.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618394879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79950 + ... + 87342.

It is an arithmetic number, because the mean of its divisors is an integer number (42977625).

Almost surely, 2^618394878 is an apocalyptic number.

618394878 is an abundant number, since it is smaller than the sum of its proper divisors (756889122).

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

618394878 is a wasteful number, since it uses less digits than its factorization.

618394878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8953 (or 8947 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 618394878 is about 24867.5466823730. The cubic root of 618394878 is about 851.9654072446.

The spelling of 618394878 in words is "six hundred eighteen million, three hundred ninety-four thousand, eight hundred seventy-eight".