99291420 has 60 divisors (see below), whose sum is σ = 311485944. Its totient is φ = 26477280.

The previous prime is 99291371. The next prime is 99291433. The reversal of 99291420 is 2419299.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 19 ways as a sum of consecutive naturals, for example, 29026 + ... + 32265.

Almost surely, 2^99291420 is an apocalyptic number.

99291420 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99291420 is an abundant number, since it is smaller than the sum of its proper divisors (212194524).

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

99291420 is a wasteful number, since it uses less digits than its factorization.

99291420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61312 (or 61301 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 99291420 is about 9964.5080159534. The cubic root of 99291420 is about 463.0599713643.

The spelling of 99291420 in words is "ninety-nine million, two hundred ninety-one thousand, four hundred twenty".