28747907 has 8 divisors (see below), whose sum is σ = 30101760. Its totient is φ = 27402760.

The previous prime is 28747843. The next prime is 28747913. The reversal of 28747907 is 70974782.

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

It is a cyclic number.

It is not a de Polignac number, because 28747907 - 2⁶ = 28747843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28747997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5144 + ... + 9162.

It is an arithmetic number, because the mean of its divisors is an integer number (3762720).

Almost surely, 2^28747907 is an apocalyptic number.

28747907 is a deficient number, since it is larger than the sum of its proper divisors (1353853).

28747907 is a wasteful number, since it uses less digits than its factorization.

28747907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4353.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 28747907 is about 5361.7074705732. The cubic root of 28747907 is about 306.3388495779.

The spelling of 28747907 in words is "twenty-eight million, seven hundred forty-seven thousand, nine hundred seven".