29978901 has 12 divisors (see below), whose sum is σ = 43350528. Its totient is φ = 19963944.

The previous prime is 29978899. The next prime is 29978909. The reversal of 29978901 is 10987992.

It is not a de Polignac number, because 29978901 - 2¹ = 29978899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29978909) 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, 13966 + ... + 15968.

It is an arithmetic number, because the mean of its divisors is an integer number (3612544).

Almost surely, 2^29978901 is an apocalyptic number.

It is an amenable number.

29978901 is a deficient number, since it is larger than the sum of its proper divisors (13371627).

29978901 is a wasteful number, since it uses less digits than its factorization.

29978901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3672 (or 3669 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 29978901 is about 5475.2991699084. The cubic root of 29978901 is about 310.6503896243.

The spelling of 29978901 in words is "twenty-nine million, nine hundred seventy-eight thousand, nine hundred one".