998915454 has 24 divisors (see below), whose sum is σ = 2164951152. Its totient is φ = 332874240.

The previous prime is 998915453. The next prime is 998915473. The reversal of 998915454 is 454519899.

998915454 is a `hidden beast` number, since 9 + 9 + 8 + 91 + 545 + 4 = 666.

It is a super-3 number, since 3×998915454³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 998915454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998915453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81982 + ... + 93374.

It is an arithmetic number, because the mean of its divisors is an integer number (90206298).

Almost surely, 2^998915454 is an apocalyptic number.

998915454 is an abundant number, since it is smaller than the sum of its proper divisors (1166035698).

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

998915454 is a wasteful number, since it uses less digits than its factorization.

998915454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16272 (or 16269 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The square root of 998915454 is about 31605.6237717277. The cubic root of 998915454 is about 999.6383538945.

The spelling of 998915454 in words is "nine hundred ninety-eight million, nine hundred fifteen thousand, four hundred fifty-four".