29280872 has 8 divisors (see below), whose sum is σ = 54901650. Its totient is φ = 14640432.

The previous prime is 29280869. The next prime is 29280883. The reversal of 29280872 is 27808292.

It can be written as a sum of positive squares in only one way, i.e., 20124196 + 9156676 = 4486^2 + 3026^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830047 + ... + 1830062.

Almost surely, 2^29280872 is an apocalyptic number.

It is an amenable number.

29280872 is a deficient number, since it is larger than the sum of its proper divisors (25620778).

29280872 is a wasteful number, since it uses less digits than its factorization.

29280872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3660115 (or 3660111 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 29280872 is about 5411.1802779061. The cubic root of 29280872 is about 308.2203685197.

The spelling of 29280872 in words is "twenty-nine million, two hundred eighty thousand, eight hundred seventy-two".