28046621 has 8 divisors (see below), whose sum is σ = 28774944. Its totient is φ = 27321840.

The previous prime is 28046609. The next prime is 28046657. The reversal of 28046621 is 12664082.

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 28046621 - 2¹⁴ = 28030237 is a prime.

It is a super-2 number, since 2×28046621² = 1573225899035282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28046671) 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, 23366 + ... + 24536.

It is an arithmetic number, because the mean of its divisors is an integer number (3596868).

Almost surely, 2^28046621 is an apocalyptic number.

It is an amenable number.

28046621 is a deficient number, since it is larger than the sum of its proper divisors (728323).

28046621 is a wasteful number, since it uses less digits than its factorization.

28046621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28046621 is about 5295.9060603451. The cubic root of 28046621 is about 303.8273380384.

The spelling of 28046621 in words is "twenty-eight million, forty-six thousand, six hundred twenty-one".