118905840 has 80 divisors (see below), whose sum is σ = 409572000. Its totient is φ = 31707648.

The previous prime is 118905833. The next prime is 118905877. The reversal of 118905840 is 48509811.

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

It is a super-2 number, since 2×118905840² = 28277197572211200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 118905795 and 118905804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25365 + ... + 29684.

It is an arithmetic number, because the mean of its divisors is an integer number (5119650).

Almost surely, 2^118905840 is an apocalyptic number.

118905840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

118905840 is an abundant number, since it is smaller than the sum of its proper divisors (290666160).

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

118905840 is a wasteful number, since it uses less digits than its factorization.

118905840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55071 (or 55059 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 118905840 is about 10904.3954440400. The cubic root of 118905840 is about 491.7387071814.

The spelling of 118905840 in words is "one hundred eighteen million, nine hundred five thousand, eight hundred forty".