99190428 has 24 divisors (see below), whose sum is σ = 231638400. Its totient is φ = 33035760.

The previous prime is 99190423. The next prime is 99190433. The reversal of 99190428 is 82409199.

It is an interprime number because it is at equal distance from previous prime (99190423) and next prime (99190433).

It is a self number, because there is not a number n which added to its sum of digits gives 99190428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99190423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15673 + ... + 21071.

It is an arithmetic number, because the mean of its divisors is an integer number (9651600).

Almost surely, 2^99190428 is an apocalyptic number.

It is an amenable number.

99190428 is an abundant number, since it is smaller than the sum of its proper divisors (132447972).

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

99190428 is a wasteful number, since it uses less digits than its factorization.

99190428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6937 (or 6935 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 99190428 is about 9959.4391408352. The cubic root of 99190428 is about 462.9029211477.

It can be divided in two parts, 991 and 90428, that added together give a palindrome (91419).

The spelling of 99190428 in words is "ninety-nine million, one hundred ninety thousand, four hundred twenty-eight".