3186117990 has 160 divisors (see below), whose sum is σ = 9381674016. Its totient is φ = 769443840.

The previous prime is 3186117983. The next prime is 3186118007. The reversal of 3186117990 is 997116813.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3144724 + ... + 3145736.

Almost surely, 2^3186117990 is an apocalyptic number.

3186117990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3186117990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4690837008).

3186117990 is an abundant number, since it is smaller than the sum of its proper divisors (6195556026).

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

3186117990 is a wasteful number, since it uses less digits than its factorization.

3186117990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396 (or 1387 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 3186117990 is about 56445.7083399615. The cubic root of 3186117990 is about 1471.4786038717.

The spelling of 3186117990 in words is "three billion, one hundred eighty-six million, one hundred seventeen thousand, nine hundred ninety".