29988990 has 48 divisors (see below), whose sum is σ = 79455168. Its totient is φ = 7844928.

The previous prime is 29988989. The next prime is 29988991. The reversal of 29988990 is 9988992.

It is an interprime number because it is at equal distance from previous prime (29988989) and next prime (29988991).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29988991) 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, 1627 + ... + 7913.

It is an arithmetic number, because the mean of its divisors is an integer number (1655316).

Almost surely, 2^29988990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29988990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39727584).

29988990 is an abundant number, since it is smaller than the sum of its proper divisors (49466178).

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

29988990 is a wasteful number, since it uses less digits than its factorization.

29988990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6353 (or 6350 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The square root of 29988990 is about 5476.2204119265. The cubic root of 29988990 is about 310.6852341333.

The spelling of 29988990 in words is "twenty-nine million, nine hundred eighty-eight thousand, nine hundred ninety".