28438701 has 4 divisors (see below), whose sum is σ = 37918272. Its totient is φ = 18959132.

The previous prime is 28438693. The next prime is 28438703. The reversal of 28438701 is 10783482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28438701 - 2³ = 28438693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28438703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4739781 + ... + 4739786.

It is an arithmetic number, because the mean of its divisors is an integer number (9479568).

Almost surely, 2^28438701 is an apocalyptic number.

It is an amenable number.

28438701 is a deficient number, since it is larger than the sum of its proper divisors (9479571).

28438701 is an equidigital number, since it uses as much as digits as its factorization.

28438701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9479570.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 28438701 is about 5332.7948582333. The cubic root of 28438701 is about 305.2365843313.

The spelling of 28438701 in words is "twenty-eight million, four hundred thirty-eight thousand, seven hundred one".