198401012 has 6 divisors (see below), whose sum is σ = 347201778. Its totient is φ = 99200504.

The previous prime is 198400981. The next prime is 198401017. The reversal of 198401012 is 210104891.

It can be written as a sum of positive squares in only one way, i.e., 194993296 + 3407716 = 13964^2 + 1846^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198401017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24800123 + ... + 24800130.

It is an arithmetic number, because the mean of its divisors is an integer number (57866963).

Almost surely, 2^198401012 is an apocalyptic number.

It is an amenable number.

198401012 is a deficient number, since it is larger than the sum of its proper divisors (148800766).

198401012 is a wasteful number, since it uses less digits than its factorization.

198401012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49600257 (or 49600255 counting only the distinct ones).

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

The square root of 198401012 is about 14085.4894128674. The cubic root of 198401012 is about 583.2408859936.

The spelling of 198401012 in words is "one hundred ninety-eight million, four hundred one thousand, twelve".