118921400 has 96 divisors (see below), whose sum is σ = 303730560. Its totient is φ = 43031040.

The previous prime is 118921393. The next prime is 118921427. The reversal of 118921400 is 4129811.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 118921400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137369 + ... + 138231.

It is an arithmetic number, because the mean of its divisors is an integer number (3163860).

Almost surely, 2^118921400 is an apocalyptic number.

118921400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 118921400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151865280).

118921400 is an abundant number, since it is smaller than the sum of its proper divisors (184809160).

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

118921400 is a wasteful number, since it uses less digits than its factorization.

118921400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 118921400 is about 10905.1088944586. The cubic root of 118921400 is about 491.7601558632.

The spelling of 118921400 in words is "one hundred eighteen million, nine hundred twenty-one thousand, four hundred".