29972866399 has 24 divisors (see below), whose sum is σ = 35265630960. Its totient is φ = 25398543744.

The previous prime is 29972866387. The next prime is 29972866411. The reversal of 29972866399 is 99366827992.

It is an interprime number because it is at equal distance from previous prime (29972866387) and next prime (29972866411).

It is not a de Polignac number, because 29972866399 - 2²¹ = 29970769247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29972866349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1507507 + ... + 1527259.

It is an arithmetic number, because the mean of its divisors is an integer number (1469401290).

Almost surely, 2^29972866399 is an apocalyptic number.

29972866399 is a deficient number, since it is larger than the sum of its proper divisors (5292764561).

29972866399 is a wasteful number, since it uses less digits than its factorization.

29972866399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20119 (or 20112 counting only the distinct ones).

The product of its digits is 158723712, while the sum is 70.

The spelling of 29972866399 in words is "twenty-nine billion, nine hundred seventy-two million, eight hundred sixty-six thousand, three hundred ninety-nine".