28746507 has 8 divisors (see below), whose sum is σ = 40583376. Its totient is φ = 18036992.

The previous prime is 28746503. The next prime is 28746533. The reversal of 28746507 is 70564782.

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 28746507 - 2² = 28746503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28746503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281778 + ... + 281879.

It is an arithmetic number, because the mean of its divisors is an integer number (5072922).

Almost surely, 2^28746507 is an apocalyptic number.

28746507 is a deficient number, since it is larger than the sum of its proper divisors (11836869).

28746507 is a wasteful number, since it uses less digits than its factorization.

28746507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563677.

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

The square root of 28746507 is about 5361.5769135582. The cubic root of 28746507 is about 306.3338766784. Note that the first 3 decimals are identical.

The spelling of 28746507 in words is "twenty-eight million, seven hundred forty-six thousand, five hundred seven".