99931420 has 48 divisors (see below), whose sum is σ = 215673696. Its totient is φ = 38880000.

The previous prime is 99931417. The next prime is 99931439. The reversal of 99931420 is 2413999.

It is a self number, because there is not a number n which added to its sum of digits gives 99931420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122815 + ... + 123625.

It is an arithmetic number, because the mean of its divisors is an integer number (4493202).

Almost surely, 2^99931420 is an apocalyptic number.

It is an amenable number.

99931420 is an abundant number, since it is smaller than the sum of its proper divisors (115742276).

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

99931420 is a wasteful number, since it uses less digits than its factorization.

99931420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 980 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 99931420 is about 9996.5704118963. The cubic root of 99931420 is about 464.0527523753.

The spelling of 99931420 in words is "ninety-nine million, nine hundred thirty-one thousand, four hundred twenty".