115161720 has 32 divisors (see below), whose sum is σ = 345485520. Its totient is φ = 30709760.

The previous prime is 115161719. The next prime is 115161727. The reversal of 115161720 is 27161511.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115161727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479721 + ... + 479960.

Almost surely, 2^115161720 is an apocalyptic number.

115161720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115161720 is an abundant number, since it is smaller than the sum of its proper divisors (230323800).

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

115161720 is a wasteful number, since it uses less digits than its factorization.

115161720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959695 (or 959691 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 24.

The square root of 115161720 is about 10731.3428796214. The cubic root of 115161720 is about 486.5222586075.

The spelling of 115161720 in words is "one hundred fifteen million, one hundred sixty-one thousand, seven hundred twenty".