29990840 has 32 divisors (see below), whose sum is σ = 73614960. Its totient is φ = 10905600.

The previous prime is 29990801. The next prime is 29990867. The reversal of 29990840 is 4809992.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33641 + ... + 34520.

Almost surely, 2^29990840 is an apocalyptic number.

29990840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29990840 is an abundant number, since it is smaller than the sum of its proper divisors (43624120).

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

29990840 is a wasteful number, since it uses less digits than its factorization.

29990840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68183 (or 68179 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 29990840 is about 5476.3893214416. The cubic root of 29990840 is about 310.6916226542.

The spelling of 29990840 in words is "twenty-nine million, nine hundred ninety thousand, eight hundred forty".