29972738 has 8 divisors (see below), whose sum is σ = 46174332. Its totient is φ = 14581296.

The previous prime is 29972737. The next prime is 29972741. The reversal of 29972738 is 83727992.

It can be written as a sum of positive squares in 2 ways, for example, as 29343889 + 628849 = 5417^2 + 793^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 29972692 and 29972701.

It is not an unprimeable number, because it can be changed into a prime (29972731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202445 + ... + 202592.

Almost surely, 2^29972738 is an apocalyptic number.

29972738 is a deficient number, since it is larger than the sum of its proper divisors (16201594).

29972738 is a wasteful number, since it uses less digits than its factorization.

29972738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405076.

The product of its digits is 381024, while the sum is 47.

The square root of 29972738 is about 5474.7363406834. The cubic root of 29972738 is about 310.6291005454.

It can be divided in two parts, 299 and 72738, that added together give a palindrome (73037).

The spelling of 29972738 in words is "twenty-nine million, nine hundred seventy-two thousand, seven hundred thirty-eight".