28436941 has 4 divisors (see below), whose sum is σ = 30624412. Its totient is φ = 26249472.

The previous prime is 28436929. The next prime is 28436957. The reversal of 28436941 is 14963482.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19616041 + 8820900 = 4429^2 + 2970^2 .

It is a cyclic number.

It is not a de Polignac number, because 28436941 - 2⁵ = 28436909 is a prime.

It is a super-2 number, since 2×28436941² = 1617319226874962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28436941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28436911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1093716 + ... + 1093741.

It is an arithmetic number, because the mean of its divisors is an integer number (7656103).

Almost surely, 2^28436941 is an apocalyptic number.

It is an amenable number.

28436941 is a deficient number, since it is larger than the sum of its proper divisors (2187471).

28436941 is a wasteful number, since it uses less digits than its factorization.

28436941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187470.

The product of its digits is 41472, while the sum is 37.

The square root of 28436941 is about 5332.6298390194. The cubic root of 28436941 is about 305.2302874254.

The spelling of 28436941 in words is "twenty-eight million, four hundred thirty-six thousand, nine hundred forty-one".