29490981 has 8 divisors (see below), whose sum is σ = 42346080. Its totient is φ = 18148272.

The previous prime is 29490977. The next prime is 29490997. The reversal of 29490981 is 18909492.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 29490981 - 2² = 29490977 is a prime.

It is a super-2 number, since 2×29490981² = 1739435920684722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29490781) 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, 378051 + ... + 378128.

It is an arithmetic number, because the mean of its divisors is an integer number (5293260).

Almost surely, 2^29490981 is an apocalyptic number.

It is an amenable number.

29490981 is a deficient number, since it is larger than the sum of its proper divisors (12855099).

29490981 is a wasteful number, since it uses less digits than its factorization.

29490981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756195.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 29490981 is about 5430.5599158834. The cubic root of 29490981 is about 308.9558383071.

The spelling of 29490981 in words is "twenty-nine million, four hundred ninety thousand, nine hundred eighty-one".