28645749 has 48 divisors (see below), whose sum is σ = 48310080. Its totient is φ = 16174080.

The previous prime is 28645723. The next prime is 28645753. The reversal of 28645749 is 94754682.

It is a happy number.

It is not a de Polignac number, because 28645749 - 2⁵ = 28645717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28645759) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 182379 + ... + 182535.

It is an arithmetic number, because the mean of its divisors is an integer number (1006460).

Almost surely, 2^28645749 is an apocalyptic number.

It is an amenable number.

28645749 is a deficient number, since it is larger than the sum of its proper divisors (19664331).

28645749 is a wasteful number, since it uses less digits than its factorization.

28645749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 287 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 28645749 is about 5352.1723626954. The cubic root of 28645749 is about 305.9755523208.

The spelling of 28645749 in words is "twenty-eight million, six hundred forty-five thousand, seven hundred forty-nine".