29990331 has 36 divisors (see below), whose sum is σ = 51488112. Its totient is φ = 17111088.

The previous prime is 29990327. The next prime is 29990351. The reversal of 29990331 is 13309992.

It is not a de Polignac number, because 29990331 - 2² = 29990327 is a prime.

It is a super-2 number, since 2×29990331² = 1798839906979122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (29990351) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 45601 + ... + 46253.

Almost surely, 2^29990331 is an apocalyptic number.

29990331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

29990331 is a deficient number, since it is larger than the sum of its proper divisors (21497781).

29990331 is an frugal number, since it uses more digits than its factorization.

29990331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 29990331 is about 5476.3428490189. The cubic root of 29990331 is about 310.6898649738.

The spelling of 29990331 in words is "twenty-nine million, nine hundred ninety thousand, three hundred thirty-one".