29997988 has 12 divisors (see below), whose sum is σ = 52542000. Its totient is φ = 14985992.

The previous prime is 29997983. The next prime is 29997991. The reversal of 29997988 is 88979992.

It is not an unprimeable number, because it can be changed into a prime (29997983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3495 + ... + 8497.

It is an arithmetic number, because the mean of its divisors is an integer number (4378500).

Almost surely, 2^29997988 is an apocalyptic number.

It is an amenable number.

29997988 is a deficient number, since it is larger than the sum of its proper divisors (22544012).

29997988 is a wasteful number, since it uses less digits than its factorization.

29997988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6506 (or 6504 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 61.

The square root of 29997988 is about 5477.0419023411. The cubic root of 29997988 is about 310.7163040492.

The spelling of 29997988 in words is "twenty-nine million, nine hundred ninety-seven thousand, nine hundred eighty-eight".