28533747 has 16 divisors (see below), whose sum is σ = 42388992. Its totient is φ = 16924320.

The previous prime is 28533737. The next prime is 28533761. The reversal of 28533747 is 74733582.

It is not a de Polignac number, because 28533747 - 2⁷ = 28533619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28533727) 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, 7648 + ... + 10749.

It is an arithmetic number, because the mean of its divisors is an integer number (2649312).

Almost surely, 2^28533747 is an apocalyptic number.

28533747 is a deficient number, since it is larger than the sum of its proper divisors (13855245).

28533747 is a wasteful number, since it uses less digits than its factorization.

28533747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18458.

The product of its digits is 141120, while the sum is 39.

The square root of 28533747 is about 5341.6988870583. The cubic root of 28533747 is about 305.5762535743.

The spelling of 28533747 in words is "twenty-eight million, five hundred thirty-three thousand, seven hundred forty-seven".