117557720 has 64 divisors (see below), whose sum is σ = 320086080. Its totient is φ = 37933056.

The previous prime is 117557717. The next prime is 117557729. The reversal of 117557720 is 27755711.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117557729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7589 + ... + 17108.

It is an arithmetic number, because the mean of its divisors is an integer number (5001345).

Almost surely, 2^117557720 is an apocalyptic number.

117557720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117557720 is an abundant number, since it is smaller than the sum of its proper divisors (202528360).

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

117557720 is a wasteful number, since it uses less digits than its factorization.

117557720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24732 (or 24728 counting only the distinct ones).

The product of its (nonzero) digits is 17150, while the sum is 35.

The square root of 117557720 is about 10842.4037925176. The cubic root of 117557720 is about 489.8732422362.

The spelling of 117557720 in words is "one hundred seventeen million, five hundred fifty-seven thousand, seven hundred twenty".