28961499 has 24 divisors (see below), whose sum is σ = 45147648. Its totient is φ = 16465680.

The previous prime is 28961497. The next prime is 28961501. The reversal of 28961499 is 99416982.

It is an interprime number because it is at equal distance from previous prime (28961497) and next prime (28961501).

It is not a de Polignac number, because 28961499 - 2¹ = 28961497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28961497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39474 + ... + 40200.

It is an arithmetic number, because the mean of its divisors is an integer number (1881152).

Almost surely, 2^28961499 is an apocalyptic number.

28961499 is a deficient number, since it is larger than the sum of its proper divisors (16186149).

28961499 is a wasteful number, since it uses less digits than its factorization.

28961499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015 (or 1008 counting only the distinct ones).

The product of its digits is 279936, while the sum is 48.

The square root of 28961499 is about 5381.5888917679. The cubic root of 28961499 is about 307.0956599759.

The spelling of 28961499 in words is "twenty-eight million, nine hundred sixty-one thousand, four hundred ninety-nine".