28740766 has 4 divisors (see below), whose sum is σ = 43111152. Its totient is φ = 14370382.

The previous prime is 28740743. The next prime is 28740773. The reversal of 28740766 is 66704782.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7185190 + ... + 7185193.

It is an arithmetic number, because the mean of its divisors is an integer number (10777788).

Almost surely, 2^28740766 is an apocalyptic number.

28740766 is a deficient number, since it is larger than the sum of its proper divisors (14370386).

28740766 is a wasteful number, since it uses less digits than its factorization.

28740766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14370385.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 28740766 is about 5361.0415032902. The cubic root of 28740766 is about 306.3134825499.

The spelling of 28740766 in words is "twenty-eight million, seven hundred forty thousand, seven hundred sixty-six".