99396990 has 192 divisors, whose sum is σ = 336856320. Its totient is φ = 20623680.

The previous prime is 99396959. The next prime is 99397021. The reversal of 99396990 is 9969399.

It is an interprime number because it is at equal distance from previous prime (99396959) and next prime (99397021).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 145189 + ... + 145871.

It is an arithmetic number, because the mean of its divisors is an integer number (1754460).

Almost surely, 2^99396990 is an apocalyptic number.

99396990 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 99396990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168428160).

99396990 is an abundant number, since it is smaller than the sum of its proper divisors (237459330).

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

99396990 is a wasteful number, since it uses less digits than its factorization.

99396990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 1062882, while the sum is 54.

The square root of 99396990 is about 9969.8039098069. The cubic root of 99396990 is about 463.2240269155.

The spelling of 99396990 in words is "ninety-nine million, three hundred ninety-six thousand, nine hundred ninety".