198187740 has 72 divisors (see below), whose sum is σ = 621915840. Its totient is φ = 51026304.

The previous prime is 198187739. The next prime is 198187753. The reversal of 198187740 is 47781891.

198187740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13764 + ... + 24203.

It is an arithmetic number, because the mean of its divisors is an integer number (8637720).

Almost surely, 2^198187740 is an apocalyptic number.

198187740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198187740 is an abundant number, since it is smaller than the sum of its proper divisors (423728100).

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

198187740 is a wasteful number, since it uses less digits than its factorization.

198187740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38011 (or 38006 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The square root of 198187740 is about 14077.9167492921. The cubic root of 198187740 is about 583.0318253199.

The spelling of 198187740 in words is "one hundred ninety-eight million, one hundred eighty-seven thousand, seven hundred forty".