3318729156 has 72 divisors (see below), whose sum is σ = 8897388864. Its totient is φ = 1040783040.

The previous prime is 3318729119. The next prime is 3318729181. The reversal of 3318729156 is 6519278133.

It is a super-2 number, since 2×3318729156² = 22027926421768944672, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17655 + ... + 83361.

Almost surely, 2^3318729156 is an apocalyptic number.

3318729156 is a gapful number since it is divisible by the number (36) 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 3318729156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4448694432).

3318729156 is an abundant number, since it is smaller than the sum of its proper divisors (5578659708).

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

3318729156 is a wasteful number, since it uses less digits than its factorization.

3318729156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65801 (or 65796 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 3318729156 is about 57608.4121982198. The cubic root of 3318729156 is about 1491.6168140776.

The spelling of 3318729156 in words is "three billion, three hundred eighteen million, seven hundred twenty-nine thousand, one hundred fifty-six".