28418701 has 4 divisors (see below), whose sum is σ = 29186812. Its totient is φ = 27650592.

The previous prime is 28418693. The next prime is 28418711. The reversal of 28418701 is 10781482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25745476 + 2673225 = 5074^2 + 1635^2 .

It is a cyclic number.

It is not a de Polignac number, because 28418701 - 2³ = 28418693 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 (28418711) 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, 384000 + ... + 384073.

It is an arithmetic number, because the mean of its divisors is an integer number (7296703).

Almost surely, 2^28418701 is an apocalyptic number.

It is an amenable number.

28418701 is a deficient number, since it is larger than the sum of its proper divisors (768111).

28418701 is an equidigital number, since it uses as much as digits as its factorization.

28418701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768110.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 28418701 is about 5330.9193391009. The cubic root of 28418701 is about 305.1650132782.

The spelling of 28418701 in words is "twenty-eight million, four hundred eighteen thousand, seven hundred one".