618438756 has 48 divisors (see below), whose sum is σ = 1569451968. Its totient is φ = 188400000.

The previous prime is 618438749. The next prime is 618438773. The reversal of 618438756 is 657834816.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3870 + ... + 35381.

It is an arithmetic number, because the mean of its divisors is an integer number (32696916).

Almost surely, 2^618438756 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618438756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (784725984).

618438756 is an abundant number, since it is smaller than the sum of its proper divisors (951013212).

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

618438756 is a wasteful number, since it uses less digits than its factorization.

618438756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39372 (or 39370 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 618438756 is about 24868.4289009177. The cubic root of 618438756 is about 851.9855570740.

It can be divided in two parts, 61843875 and 6, that added together give a triangular number (61843881 = T₁₁₁₂₁).

The spelling of 618438756 in words is "six hundred eighteen million, four hundred thirty-eight thousand, seven hundred fifty-six".