28534621 has 8 divisors (see below), whose sum is σ = 29023488. Its totient is φ = 28050000.

The previous prime is 28534613. The next prime is 28534643. The reversal of 28534621 is 12643582.

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 28534621 - 2³ = 28534613 is a prime.

It is a super-2 number, since 2×28534621² = 1628449191227282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28534661) 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, 14316 + ... + 16186.

It is an arithmetic number, because the mean of its divisors is an integer number (3627936).

Almost surely, 2^28534621 is an apocalyptic number.

It is an amenable number.

28534621 is a deficient number, since it is larger than the sum of its proper divisors (488867).

28534621 is a wasteful number, since it uses less digits than its factorization.

28534621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123.

The product of its digits is 11520, while the sum is 31.

The square root of 28534621 is about 5341.7806956108. The cubic root of 28534621 is about 305.5793735165.

The spelling of 28534621 in words is "twenty-eight million, five hundred thirty-four thousand, six hundred twenty-one".