29993988 has 24 divisors (see below), whose sum is σ = 72244480. Its totient is φ = 9675360.

The previous prime is 29993981. The next prime is 29994017. The reversal of 29993988 is 88939992.

It is a super-2 number, since 2×29993988² = 1799278632288288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (29993981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39943 + ... + 40686.

Almost surely, 2^29993988 is an apocalyptic number.

It is an amenable number.

29993988 is an abundant number, since it is smaller than the sum of its proper divisors (42250492).

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

29993988 is a wasteful number, since it uses less digits than its factorization.

29993988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80667 (or 80665 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 57.

The square root of 29993988 is about 5476.6767295505. The cubic root of 29993988 is about 310.7024928956.

The spelling of 29993988 in words is "twenty-nine million, nine hundred ninety-three thousand, nine hundred eighty-eight".