29972745 has 48 divisors (see below), whose sum is σ = 57193344. Its totient is φ = 14400000.

The previous prime is 29972743. The next prime is 29972759. The reversal of 29972745 is 54727992.

It is not a de Polignac number, because 29972745 - 2¹ = 29972743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 29972745.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29972741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74545 + ... + 74945.

It is an arithmetic number, because the mean of its divisors is an integer number (1191528).

Almost surely, 2^29972745 is an apocalyptic number.

It is an amenable number.

29972745 is a deficient number, since it is larger than the sum of its proper divisors (27220599).

29972745 is a wasteful number, since it uses less digits than its factorization.

29972745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 571 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 29972745 is about 5474.7369799836. The cubic root of 29972745 is about 310.6291247275.

The spelling of 29972745 in words is "twenty-nine million, nine hundred seventy-two thousand, seven hundred forty-five".