28040435 has 8 divisors (see below), whose sum is σ = 34364736. Its totient is φ = 21954880.

The previous prime is 28040431. The next prime is 28040437. The reversal of 28040435 is 53404082.

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

It is not a de Polignac number, because 28040435 - 2² = 28040431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28040431) 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 7 ways as a sum of consecutive naturals, for example, 59426 + ... + 59895.

It is an arithmetic number, because the mean of its divisors is an integer number (4295592).

Almost surely, 2^28040435 is an apocalyptic number.

28040435 is a deficient number, since it is larger than the sum of its proper divisors (6324301).

28040435 is a wasteful number, since it uses less digits than its factorization.

28040435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119373.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 28040435 is about 5295.3219920983. The cubic root of 28040435 is about 303.8049988754.

The spelling of 28040435 in words is "twenty-eight million, forty thousand, four hundred thirty-five".