998909154 has 48 divisors (see below), whose sum is σ = 2412240480. Its totient is φ = 296887680.

The previous prime is 998909111. The next prime is 998909213. The reversal of 998909154 is 451909899.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 998909154.

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, 80092 + ... + 91719.

It is an arithmetic number, because the mean of its divisors is an integer number (50255010).

Almost surely, 2^998909154 is an apocalyptic number.

998909154 is an abundant number, since it is smaller than the sum of its proper divisors (1413331326).

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

998909154 is a wasteful number, since it uses less digits than its factorization.

998909154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171855 (or 171852 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 998909154 is about 31605.5241057635. The cubic root of 998909154 is about 999.6362523704.

The spelling of 998909154 in words is "nine hundred ninety-eight million, nine hundred nine thousand, one hundred fifty-four".