29430981 has 24 divisors (see below), whose sum is σ = 45188000. Its totient is φ = 18405792.

The previous prime is 29430967. The next prime is 29430983. The reversal of 29430981 is 18903492.

It is not a de Polignac number, because 29430981 - 2⁵ = 29430949 is a prime.

It is a super-2 number, since 2×29430981² = 1732365285244722, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29430983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17850 + ... + 19428.

Almost surely, 2^29430981 is an apocalyptic number.

It is an amenable number.

29430981 is a deficient number, since it is larger than the sum of its proper divisors (15757019).

29430981 is a wasteful number, since it uses less digits than its factorization.

29430981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713 (or 1710 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 29430981 is about 5425.0328109607. The cubic root of 29430981 is about 308.7461704082.

The spelling of 29430981 in words is "twenty-nine million, four hundred thirty thousand, nine hundred eighty-one".