28113461 has 8 divisors (see below), whose sum is σ = 29830680. Its totient is φ = 26403328.

The previous prime is 28113457. The next prime is 28113523. The reversal of 28113461 is 16431182.

It can be written as a sum of positive squares in 4 ways, for example, as 87025 + 28026436 = 295^2 + 5294^2 .

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 28113461 - 2² = 28113457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28113461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28113431) 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, 7985 + ... + 10953.

It is an arithmetic number, because the mean of its divisors is an integer number (3728835).

Almost surely, 2^28113461 is an apocalyptic number.

It is an amenable number.

28113461 is a deficient number, since it is larger than the sum of its proper divisors (1717219).

28113461 is a wasteful number, since it uses less digits than its factorization.

28113461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3543.

The product of its digits is 1152, while the sum is 26.

The square root of 28113461 is about 5302.2128399377. The cubic root of 28113461 is about 304.0685044429.

The spelling of 28113461 in words is "twenty-eight million, one hundred thirteen thousand, four hundred sixty-one".