28940623 has 8 divisors (see below), whose sum is σ = 30102080. Its totient is φ = 27799200.

The previous prime is 28940609. The next prime is 28940627. The reversal of 28940623 is 32604982.

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 28940623 - 2⁹ = 28940111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28940627) 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, 2028 + ... + 7873.

It is an arithmetic number, because the mean of its divisors is an integer number (3762760).

Almost surely, 2^28940623 is an apocalyptic number.

28940623 is a deficient number, since it is larger than the sum of its proper divisors (1161457).

28940623 is an equidigital number, since it uses as much as digits as its factorization.

28940623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10017.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 28940623 is about 5379.6489662431. The cubic root of 28940623 is about 307.0218554399.

The spelling of 28940623 in words is "twenty-eight million, nine hundred forty thousand, six hundred twenty-three".