154198986 has 16 divisors (see below), whose sum is σ = 308666784. Its totient is φ = 51354864.

The previous prime is 154198981. The next prime is 154198987. The reversal of 154198986 is 689891451.

It is not an unprimeable number, because it can be changed into a prime (154198981) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3316 + ... + 17871.

It is an arithmetic number, because the mean of its divisors is an integer number (19291674).

Almost surely, 2^154198986 is an apocalyptic number.

154198986 is an abundant number, since it is smaller than the sum of its proper divisors (154467798).

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

154198986 is a wasteful number, since it uses less digits than its factorization.

154198986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22405.

The product of its digits is 622080, while the sum is 51.

The square root of 154198986 is about 12417.6884322325. The cubic root of 154198986 is about 536.2416046197.

The spelling of 154198986 in words is "one hundred fifty-four million, one hundred ninety-eight thousand, nine hundred eighty-six".