28999545 has 16 divisors (see below), whose sum is σ = 46578240. Its totient is φ = 15406784.

The previous prime is 28999513. The next prime is 28999549. The reversal of 28999545 is 54599982.

It is a cyclic number.

It is not a de Polignac number, because 28999545 - 2⁵ = 28999513 is a prime.

It is a super-2 number, since 2×28999545² = 1681947220414050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28999549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442 + ... + 7628.

It is an arithmetic number, because the mean of its divisors is an integer number (2911140).

Almost surely, 2^28999545 is an apocalyptic number.

It is an amenable number.

28999545 is a deficient number, since it is larger than the sum of its proper divisors (17578695).

28999545 is a wasteful number, since it uses less digits than its factorization.

28999545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7464.

The product of its digits is 1166400, while the sum is 51.

The square root of 28999545 is about 5385.1225612794. The cubic root of 28999545 is about 307.2300757738.

The spelling of 28999545 in words is "twenty-eight million, nine hundred ninety-nine thousand, five hundred forty-five".