28783461 has 16 divisors (see below), whose sum is σ = 46169600. Its totient is φ = 15581808.

The previous prime is 28783427. The next prime is 28783463. The reversal of 28783461 is 16438782.

It is a de Polignac number, because none of the positive numbers 2^k-28783461 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 (28783463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35671 + ... + 36468.

It is an arithmetic number, because the mean of its divisors is an integer number (2885600).

Almost surely, 2^28783461 is an apocalyptic number.

28783461 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28783461 is a deficient number, since it is larger than the sum of its proper divisors (17386139).

28783461 is a wasteful number, since it uses less digits than its factorization.

28783461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72168.

The product of its digits is 64512, while the sum is 39.

The square root of 28783461 is about 5365.0219943631. The cubic root of 28783461 is about 306.4650858344.

The spelling of 28783461 in words is "twenty-eight million, seven hundred eighty-three thousand, four hundred sixty-one".