99278538 has 32 divisors (see below), whose sum is σ = 210677760. Its totient is φ = 31080960.

The previous prime is 99278527. The next prime is 99278549. The reversal of 99278538 is 83587299.

It is an interprime number because it is at equal distance from previous prime (99278527) and next prime (99278549).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76983 + ... + 78261.

It is an arithmetic number, because the mean of its divisors is an integer number (6583680).

Almost surely, 2^99278538 is an apocalyptic number.

99278538 is an abundant number, since it is smaller than the sum of its proper divisors (111399222).

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

99278538 is a wasteful number, since it uses less digits than its factorization.

99278538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062.

The product of its digits is 1088640, while the sum is 51.

The square root of 99278538 is about 9963.8616008052. The cubic root of 99278538 is about 463.0399448049.

The spelling of 99278538 in words is "ninety-nine million, two hundred seventy-eight thousand, five hundred thirty-eight".