28783401 has 16 divisors (see below), whose sum is σ = 39412800. Its totient is φ = 18678528.

The previous prime is 28783393. The next prime is 28783409. The reversal of 28783401 is 10438782.

It is an interprime number because it is at equal distance from previous prime (28783393) and next prime (28783409).

It is not a de Polignac number, because 28783401 - 2³ = 28783393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28783409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17085 + ... + 18693.

It is an arithmetic number, because the mean of its divisors is an integer number (2463300).

Almost surely, 2^28783401 is an apocalyptic number.

It is an amenable number.

28783401 is a deficient number, since it is larger than the sum of its proper divisors (10629399).

28783401 is a wasteful number, since it uses less digits than its factorization.

28783401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768.

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

The square root of 28783401 is about 5365.0164025844. The cubic root of 28783401 is about 306.4648728890.

The spelling of 28783401 in words is "twenty-eight million, seven hundred eighty-three thousand, four hundred one".