29901172 has 36 divisors (see below), whose sum is σ = 61182660. Its totient is φ = 12749184.

The previous prime is 29901167. The next prime is 29901187. The reversal of 29901172 is 27110992.

It can be written as a sum of positive squares in 2 ways, for example, as 22524516 + 7376656 = 4746^2 + 2716^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72904 + ... + 73312.

Almost surely, 2^29901172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29901172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30591330).

29901172 is an abundant number, since it is smaller than the sum of its proper divisors (31281488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29901172 is a wasteful number, since it uses less digits than its factorization.

29901172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800 (or 791 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 29901172 is about 5468.1964119808. The cubic root of 29901172 is about 310.3816734893.

The spelling of 29901172 in words is "twenty-nine million, nine hundred one thousand, one hundred seventy-two".