29993990 has 32 divisors (see below), whose sum is σ = 59391360. Its totient is φ = 10836864.

The previous prime is 29993981. The next prime is 29994017. The reversal of 29993990 is 9939992.

It is a super-2 number, since 2×29993990² = 1799278872240200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3656 + ... + 8564.

It is an arithmetic number, because the mean of its divisors is an integer number (1855980).

Almost surely, 2^29993990 is an apocalyptic number.

29993990 is a deficient number, since it is larger than the sum of its proper divisors (29397370).

29993990 is a wasteful number, since it uses less digits than its factorization.

29993990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4976.

The product of its (nonzero) digits is 354294, while the sum is 50.

The square root of 29993990 is about 5476.6769121430. The cubic root of 29993990 is about 310.7024998015.

The spelling of 29993990 in words is "twenty-nine million, nine hundred ninety-three thousand, nine hundred ninety".