990008250 has 384 divisors, whose sum is σ = 3277946880. Its totient is φ = 196560000.

The previous prime is 990008233. The next prime is 990008267. The reversal of 990008250 is 52800099.

990008250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (990008233) and next prime (990008267).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 12531711 + ... + 12531789.

It is an arithmetic number, because the mean of its divisors is an integer number (8536320).

Almost surely, 2^990008250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990008250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1638973440).

990008250 is an abundant number, since it is smaller than the sum of its proper divisors (2287938630).

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

990008250 is a wasteful number, since it uses less digits than its factorization.

990008250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 990008250 is about 31464.3965459374. The cubic root of 990008250 is about 996.6582618924.

The spelling of 990008250 in words is "nine hundred ninety million, eight thousand, two hundred fifty".