28994545 has 8 divisors (see below), whose sum is σ = 35113320. Its totient is φ = 22982400.

The previous prime is 28994531. The next prime is 28994549. The reversal of 28994545 is 54549982.

It can be written as a sum of positive squares in 4 ways, for example, as 8573184 + 20421361 = 2928^2 + 4519^2 .

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

It is not a de Polignac number, because 28994545 - 2⁷ = 28994417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28994495 and 28994504.

It is not an unprimeable number, because it can be changed into a prime (28994549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26056 + ... + 27145.

It is an arithmetic number, because the mean of its divisors is an integer number (4389165).

Almost surely, 2^28994545 is an apocalyptic number.

It is an amenable number.

28994545 is a deficient number, since it is larger than the sum of its proper divisors (6118775).

28994545 is a wasteful number, since it uses less digits than its factorization.

28994545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53315.

The product of its digits is 518400, while the sum is 46.

The square root of 28994545 is about 5384.6582992795. The cubic root of 28994545 is about 307.2124175810.

The spelling of 28994545 in words is "twenty-eight million, nine hundred ninety-four thousand, five hundred forty-five".