3218732040 has 128 divisors (see below), whose sum is σ = 10028966400. Its totient is φ = 825431040.

The previous prime is 3218732017. The next prime is 3218732047. The reversal of 3218732040 is 402378123.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 3218731989 and 3218732007.

It is not an unprimeable number, because it can be changed into a prime (3218732047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 941374 + ... + 944786.

It is an arithmetic number, because the mean of its divisors is an integer number (78351300).

Almost surely, 2^3218732040 is an apocalyptic number.

3218732040 is a gapful number since it is divisible by the number (30) 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 3218732040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5014483200).

3218732040 is an abundant number, since it is smaller than the sum of its proper divisors (6810234360).

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

3218732040 is a wasteful number, since it uses less digits than its factorization.

3218732040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727 (or 3723 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 3218732040 is about 56733.8703068987. The cubic root of 3218732040 is about 1476.4823997342.

The spelling of 3218732040 in words is "three billion, two hundred eighteen million, seven hundred thirty-two thousand, forty".