28802391 has 12 divisors (see below), whose sum is σ = 39474792. Its totient is φ = 18679968.

The previous prime is 28802383. The next prime is 28802401. The reversal of 28802391 is 19320882.

It is not a de Polignac number, because 28802391 - 2³ = 28802383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28802311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 601 + ... + 7613.

It is an arithmetic number, because the mean of its divisors is an integer number (3289566).

Almost surely, 2^28802391 is an apocalyptic number.

28802391 is a deficient number, since it is larger than the sum of its proper divisors (10672401).

28802391 is an equidigital number, since it uses as much as digits as its factorization.

28802391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7090 (or 7053 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 28802391 is about 5366.7859096483. The cubic root of 28802391 is about 306.5322553424.

The spelling of 28802391 in words is "twenty-eight million, eight hundred two thousand, three hundred ninety-one".