99037428 has 72 divisors (see below), whose sum is σ = 275137632. Its totient is φ = 27631296.

The previous prime is 99037423. The next prime is 99037429. The reversal of 99037428 is 82473099.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 99037428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99037423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23326 + ... + 27242.

It is an arithmetic number, because the mean of its divisors is an integer number (3821356).

Almost surely, 2^99037428 is an apocalyptic number.

99037428 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99037428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137568816).

99037428 is an abundant number, since it is smaller than the sum of its proper divisors (176100204).

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

99037428 is a wasteful number, since it uses less digits than its factorization.

99037428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981 (or 3972 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 99037428 is about 9951.7550211005. The cubic root of 99037428 is about 462.6647913378.

The spelling of 99037428 in words is "ninety-nine million, thirty-seven thousand, four hundred twenty-eight".