118997520 has 80 divisors (see below), whose sum is σ = 371226240. Its totient is φ = 31532032.

The previous prime is 118997507. The next prime is 118997521. The reversal of 118997520 is 25799811.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (118997521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38596 + ... + 41564.

It is an arithmetic number, because the mean of its divisors is an integer number (4640328).

Almost surely, 2^118997520 is an apocalyptic number.

118997520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

118997520 is the 8907-th pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 118997520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185613120).

118997520 is an abundant number, since it is smaller than the sum of its proper divisors (252228720).

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

118997520 is a wasteful number, since it uses less digits than its factorization.

118997520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3152 (or 3146 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 42.

The square root of 118997520 is about 10908.5984434298. The cubic root of 118997520 is about 491.8650565207.

The spelling of 118997520 in words is "one hundred eighteen million, nine hundred ninety-seven thousand, five hundred twenty".