28232491 has 8 divisors (see below), whose sum is σ = 32628960. Its totient is φ = 23926848.

The previous prime is 28232489. The next prime is 28232497. The reversal of 28232491 is 19423282.

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 28232491 - 2¹ = 28232489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28232497) 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, 22036 + ... + 23281.

It is an arithmetic number, because the mean of its divisors is an integer number (4078620).

Almost surely, 2^28232491 is an apocalyptic number.

28232491 is a deficient number, since it is larger than the sum of its proper divisors (4396469).

28232491 is an equidigital number, since it uses as much as digits as its factorization.

28232491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45413.

The product of its digits is 6912, while the sum is 31.

The square root of 28232491 is about 5313.4255429054. The cubic root of 28232491 is about 304.4970336108.

The spelling of 28232491 in words is "twenty-eight million, two hundred thirty-two thousand, four hundred ninety-one".