28740765 has 8 divisors (see below), whose sum is σ = 45985248. Its totient is φ = 15328400.

The previous prime is 28740743. The next prime is 28740773. The reversal of 28740765 is 56704782.

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

It is not a de Polignac number, because 28740765 - 2⁷ = 28740637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958011 + ... + 958040.

It is an arithmetic number, because the mean of its divisors is an integer number (5748156).

Almost surely, 2^28740765 is an apocalyptic number.

It is an amenable number.

28740765 is a deficient number, since it is larger than the sum of its proper divisors (17244483).

28740765 is a wasteful number, since it uses less digits than its factorization.

28740765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916059.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 28740765 is about 5361.0414100247. The cubic root of 28740765 is about 306.3134789973.

The spelling of 28740765 in words is "twenty-eight million, seven hundred forty thousand, seven hundred sixty-five".