117204990 has 64 divisors (see below), whose sum is σ = 325140480. Its totient is φ = 26484480.

The previous prime is 117204949. The next prime is 117204991. The reversal of 117204990 is 99402711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117204991) 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, 15555 + ... + 21825.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 2^117204990 is an apocalyptic number.

117204990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 117204990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162570240).

117204990 is an abundant number, since it is smaller than the sum of its proper divisors (207935490).

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

117204990 is a wasteful number, since it uses less digits than its factorization.

117204990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6377.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 117204990 is about 10826.1253456627. The cubic root of 117204990 is about 489.3827991920.

The spelling of 117204990 in words is "one hundred seventeen million, two hundred four thousand, nine hundred ninety".