29998989 has 6 divisors (see below), whose sum is σ = 43331886. Its totient is φ = 19999320.

The previous prime is 29998973. The next prime is 29999063. The reversal of 29998989 is 98989992.

It can be written as a sum of positive squares in only one way, i.e., 29484900 + 514089 = 5430^2 + 717^2 .

It is not a de Polignac number, because 29998989 - 2⁴ = 29998973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29998909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1666602 + ... + 1666619.

It is an arithmetic number, because the mean of its divisors is an integer number (7221981).

Almost surely, 2^29998989 is an apocalyptic number.

It is an amenable number.

29998989 is a deficient number, since it is larger than the sum of its proper divisors (13332897).

29998989 is a wasteful number, since it uses less digits than its factorization.

29998989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333227 (or 3333224 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 63.

The square root of 29998989 is about 5477.1332830232. The cubic root of 29998989 is about 310.7197600983.

The spelling of 29998989 in words is "twenty-nine million, nine hundred ninety-eight thousand, nine hundred eighty-nine".