28745667 has 12 divisors (see below), whose sum is σ = 41580864. Its totient is φ = 19136400.

The previous prime is 28745627. The next prime is 28745669. The reversal of 28745667 is 76654782.

28745667 is a `hidden beast` number, since 2 + 87 + 4 + 566 + 7 = 666.

It is not a de Polignac number, because 28745667 - 2⁶ = 28745603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28745669) 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, 5917 + ... + 9617.

It is an arithmetic number, because the mean of its divisors is an integer number (3465072).

Almost surely, 2^28745667 is an apocalyptic number.

28745667 is a deficient number, since it is larger than the sum of its proper divisors (12835197).

28745667 is a wasteful number, since it uses less digits than its factorization.

28745667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4570 (or 4567 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 28745667 is about 5361.4985778232. The cubic root of 28745667 is about 306.3308928613.

It can be divided in two parts, 287 and 45667, that added together give a palindrome (45954).

The spelling of 28745667 in words is "twenty-eight million, seven hundred forty-five thousand, six hundred sixty-seven".