618240380 has 12 divisors (see below), whose sum is σ = 1298304840. Its totient is φ = 247296144.

The previous prime is 618240367. The next prime is 618240421. The reversal of 618240380 is 83042816.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15455990 + ... + 15456029.

It is an arithmetic number, because the mean of its divisors is an integer number (108192070).

Almost surely, 2^618240380 is an apocalyptic number.

It is an amenable number.

618240380 is an abundant number, since it is smaller than the sum of its proper divisors (680064460).

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

618240380 is a wasteful number, since it uses less digits than its factorization.

618240380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30912028 (or 30912026 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 618240380 is about 24864.4400701082. The cubic root of 618240380 is about 851.8944504717.

The spelling of 618240380 in words is "six hundred eighteen million, two hundred forty thousand, three hundred eighty".