28432761 has 48 divisors (see below), whose sum is σ = 47545344. Its totient is φ = 14769216.

The previous prime is 28432753. The next prime is 28432777. The reversal of 28432761 is 16723482.

It is not a de Polignac number, because 28432761 - 2³ = 28432753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28432711) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 661206 + ... + 661248.

It is an arithmetic number, because the mean of its divisors is an integer number (990528).

Almost surely, 2^28432761 is an apocalyptic number.

28432761 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28432761 is a deficient number, since it is larger than the sum of its proper divisors (19112583).

28432761 is a wasteful number, since it uses less digits than its factorization.

28432761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 113 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 28432761 is about 5332.2378979187. The cubic root of 28432761 is about 305.2153312325.

The spelling of 28432761 in words is "twenty-eight million, four hundred thirty-two thousand, seven hundred sixty-one".