618973740 has 576 divisors, whose sum is σ = 2581383168. Its totient is φ = 116121600.

The previous prime is 618973739. The next prime is 618973793. The reversal of 618973740 is 47379816.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 8717905 + ... + 8717975.

It is an arithmetic number, because the mean of its divisors is an integer number (4481568).

Almost surely, 2^618973740 is an apocalyptic number.

618973740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618973740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1290691584).

618973740 is an abundant number, since it is smaller than the sum of its proper divisors (1962409428).

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

618973740 is a wasteful number, since it uses less digits than its factorization.

618973740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 618973740 is about 24879.1828643949. The cubic root of 618973740 is about 852.2311579357.

The spelling of 618973740 in words is "six hundred eighteen million, nine hundred seventy-three thousand, seven hundred forty".