28254621 has 8 divisors (see below), whose sum is σ = 37868800. Its totient is φ = 18738432.

The previous prime is 28254619. The next prime is 28254623. The reversal of 28254621 is 12645282.

It is an interprime number because it is at equal distance from previous prime (28254619) and next prime (28254623).

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

It is not a de Polignac number, because 28254621 - 2¹ = 28254619 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 (28254623) 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, 23821 + ... + 24978.

It is an arithmetic number, because the mean of its divisors is an integer number (4733600).

Almost surely, 2^28254621 is an apocalyptic number.

It is an amenable number.

28254621 is a deficient number, since it is larger than the sum of its proper divisors (9614179).

28254621 is a wasteful number, since it uses less digits than its factorization.

28254621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48995.

The product of its digits is 7680, while the sum is 30.

The square root of 28254621 is about 5315.5075957052. The cubic root of 28254621 is about 304.5765726953.

The spelling of 28254621 in words is "twenty-eight million, two hundred fifty-four thousand, six hundred twenty-one".