118220400 has 90 divisors (see below), whose sum is σ = 410270120. Its totient is φ = 31524480.

The previous prime is 118220393. The next prime is 118220423. The reversal of 118220400 is 4022811.

It is a tau number, because it is divible by the number of its divisors (90).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12820 + ... + 20019.

Almost surely, 2^118220400 is an apocalyptic number.

118220400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

118220400 is an abundant number, since it is smaller than the sum of its proper divisors (292049720).

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

118220400 is a wasteful number, since it uses less digits than its factorization.

118220400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32863 (or 32849 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 118220400 is about 10872.9204908341. The cubic root of 118220400 is about 490.7919997580.

The spelling of 118220400 in words is "one hundred eighteen million, two hundred twenty thousand, four hundred".