28940735 has 4 divisors (see below), whose sum is σ = 34728888. Its totient is φ = 23152584.

The previous prime is 28940731. The next prime is 28940789. The reversal of 28940735 is 53704982.

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

It is a cyclic number.

It is not a de Polignac number, because 28940735 - 2² = 28940731 is a prime.

It is a super-2 number, since 2×28940735² = 1675132284680450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28940731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2894069 + ... + 2894078.

It is an arithmetic number, because the mean of its divisors is an integer number (8682222).

Almost surely, 2^28940735 is an apocalyptic number.

28940735 is a deficient number, since it is larger than the sum of its proper divisors (5788153).

28940735 is an equidigital number, since it uses as much as digits as its factorization.

28940735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5788152.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 28940735 is about 5379.6593758341. The cubic root of 28940735 is about 307.0222514968.

The spelling of 28940735 in words is "twenty-eight million, nine hundred forty thousand, seven hundred thirty-five".