28641701 has 4 divisors (see below), whose sum is σ = 31245504. Its totient is φ = 26037900.

The previous prime is 28641649. The next prime is 28641731. The reversal of 28641701 is 10714682.

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 28641701 - 2¹⁸ = 28379557 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 (28641731) 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, 1301885 + ... + 1301906.

It is an arithmetic number, because the mean of its divisors is an integer number (7811376).

Almost surely, 2^28641701 is an apocalyptic number.

It is an amenable number.

28641701 is a deficient number, since it is larger than the sum of its proper divisors (2603803).

28641701 is a wasteful number, since it uses less digits than its factorization.

28641701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603802.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 28641701 is about 5351.7941851308. The cubic root of 28641701 is about 305.9611389270.

The spelling of 28641701 in words is "twenty-eight million, six hundred forty-one thousand, seven hundred one".