29289981 has 12 divisors (see below), whose sum is σ = 44670176. Its totient is φ = 16722960.

The previous prime is 29289937. The next prime is 29289983. The reversal of 29289981 is 18998292.

It is not a de Polignac number, because 29289981 - 2⁶ = 29289917 is a prime.

It is a super-2 number, since 2×29289981² = 1715805973960722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29289981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29289983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24211 + ... + 25391.

Almost surely, 2^29289981 is an apocalyptic number.

29289981 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

29289981 is a deficient number, since it is larger than the sum of its proper divisors (15380195).

29289981 is an frugal number, since it uses more digits than its factorization.

29289981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372 (or 1191 counting only the distinct ones).

The product of its digits is 186624, while the sum is 48.

The square root of 29289981 is about 5412.0218957428. The cubic root of 29289981 is about 308.2523266782.

The spelling of 29289981 in words is "twenty-nine million, two hundred eighty-nine thousand, nine hundred eighty-one".