28154745 has 12 divisors (see below), whose sum is σ = 48801636. Its totient is φ = 15015840.

The previous prime is 28154729. The next prime is 28154747. The reversal of 28154745 is 54745182.

It can be written as a sum of positive squares in 2 ways, for example, as 16621929 + 11532816 = 4077^2 + 3396^2 .

It is not a de Polignac number, because 28154745 - 2⁴ = 28154729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28154747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312786 + ... + 312875.

It is an arithmetic number, because the mean of its divisors is an integer number (4066803).

Almost surely, 2^28154745 is an apocalyptic number.

It is an amenable number.

28154745 is a deficient number, since it is larger than the sum of its proper divisors (20646891).

28154745 is a wasteful number, since it uses less digits than its factorization.

28154745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625672 (or 625669 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 28154745 is about 5306.1045033056. The cubic root of 28154745 is about 304.2172709533.

The spelling of 28154745 in words is "twenty-eight million, one hundred fifty-four thousand, seven hundred forty-five".