186913980 has 240 divisors, whose sum is σ = 678386016. Its totient is φ = 42577920.

The previous prime is 186913931. The next prime is 186913981. The reversal of 186913980 is 89319681.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186913981) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 302632 + ... + 303248.

Almost surely, 2^186913980 is an apocalyptic number.

186913980 is a gapful number since it is divisible by the number (10) 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 186913980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339193008).

186913980 is an abundant number, since it is smaller than the sum of its proper divisors (491472036).

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

186913980 is a wasteful number, since it uses less digits than its factorization.

186913980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 186913980 is about 13671.6487666996. The cubic root of 186913980 is about 571.7602096933.

The spelling of 186913980 in words is "one hundred eighty-six million, nine hundred thirteen thousand, nine hundred eighty".