29401981 has 32 divisors (see below), whose sum is σ = 37306368. Its totient is φ = 22619520.

The previous prime is 29401973. The next prime is 29402011. The reversal of 29401981 is 18910492.

It is not a de Polignac number, because 29401981 - 2³ = 29401973 is a prime.

It is a super-2 number, since 2×29401981² = 1728952973448722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29401481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214545 + ... + 214681.

It is an arithmetic number, because the mean of its divisors is an integer number (1165824).

Almost surely, 2^29401981 is an apocalyptic number.

It is an amenable number.

29401981 is a deficient number, since it is larger than the sum of its proper divisors (7904387).

29401981 is a wasteful number, since it uses less digits than its factorization.

29401981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 29401981 is about 5422.3593573278. The cubic root of 29401981 is about 308.6447287631.

The spelling of 29401981 in words is "twenty-nine million, four hundred one thousand, nine hundred eighty-one".