198400156 has 12 divisors (see below), whose sum is σ = 348297768. Its totient is φ = 98886512.

The previous prime is 198400133. The next prime is 198400157. The reversal of 198400156 is 651004891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198400157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76966 + ... + 79501.

It is an arithmetic number, because the mean of its divisors is an integer number (29024814).

Almost surely, 2^198400156 is an apocalyptic number.

It is an amenable number.

198400156 is a deficient number, since it is larger than the sum of its proper divisors (149897612).

198400156 is a wasteful number, since it uses less digits than its factorization.

198400156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156788 (or 156786 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 198400156 is about 14085.4590269540. The cubic root of 198400156 is about 583.2400471959.

The spelling of 198400156 in words is "one hundred ninety-eight million, four hundred thousand, one hundred fifty-six".