618972732 has 96 divisors (see below), whose sum is σ = 1852032000. Its totient is φ = 175110336.

The previous prime is 618972649. The next prime is 618972763. The reversal of 618972732 is 237279816.

618972732 is a `hidden beast` number, since 618 + 9 + 7 + 27 + 3 + 2 = 666.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73894 + ... + 81842.

It is an arithmetic number, because the mean of its divisors is an integer number (19292000).

Almost surely, 2^618972732 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 618972732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (926016000).

618972732 is an abundant number, since it is smaller than the sum of its proper divisors (1233059268).

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

618972732 is a wasteful number, since it uses less digits than its factorization.

618972732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8072 (or 8064 counting only the distinct ones).

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

The square root of 618972732 is about 24879.1626064866. The cubic root of 618972732 is about 852.2306953153.

The spelling of 618972732 in words is "six hundred eighteen million, nine hundred seventy-two thousand, seven hundred thirty-two".