99889478 has 24 divisors (see below), whose sum is σ = 165029400. Its totient is φ = 45312384.

The previous prime is 99889463. The next prime is 99889481. The reversal of 99889478 is 87498899.

It is a super-2 number, since 2×99889478² = 19955815630224968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99889478.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 17438 + ... + 22446.

It is an arithmetic number, because the mean of its divisors is an integer number (6876225).

Almost surely, 2^99889478 is an apocalyptic number.

99889478 is a deficient number, since it is larger than the sum of its proper divisors (65139922).

99889478 is a wasteful number, since it uses less digits than its factorization.

99889478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5096 (or 5083 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 62.

The square root of 99889478 is about 9994.4723722666. The cubic root of 99889478 is about 463.9878210983.

The spelling of 99889478 in words is "ninety-nine million, eight hundred eighty-nine thousand, four hundred seventy-eight".