28449087 has 8 divisors (see below), whose sum is σ = 39240240. Its totient is φ = 18312000.

The previous prime is 28449077. The next prime is 28449097. The reversal of 28449087 is 78094482.

It is an interprime number because it is at equal distance from previous prime (28449077) and next prime (28449097).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28449087 - 2¹¹ = 28447039 is a prime.

It is a super-2 number, since 2×28449087² = 1618701102267138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28449077) 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, 163414 + ... + 163587.

It is an arithmetic number, because the mean of its divisors is an integer number (4905030).

Almost surely, 2^28449087 is an apocalyptic number.

28449087 is a deficient number, since it is larger than the sum of its proper divisors (10791153).

28449087 is a wasteful number, since it uses less digits than its factorization.

28449087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327033.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 28449087 is about 5333.7685551587. The cubic root of 28449087 is about 305.2737379424.

The spelling of 28449087 in words is "twenty-eight million, four hundred forty-nine thousand, eighty-seven".