28973401 has 4 divisors (see below), whose sum is σ = 29194704. Its totient is φ = 28752100.

The previous prime is 28973393. The next prime is 28973411. The reversal of 28973401 is 10437982.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10437982 = 2 ⋅5218991.

It is a cyclic number.

It is not a de Polignac number, because 28973401 - 2³ = 28973393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28973411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110455 + ... + 110716.

It is an arithmetic number, because the mean of its divisors is an integer number (7298676).

Almost surely, 2^28973401 is an apocalyptic number.

It is an amenable number.

28973401 is a deficient number, since it is larger than the sum of its proper divisors (221303).

28973401 is a wasteful number, since it uses less digits than its factorization.

28973401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221302.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28973401 is about 5382.6945854284. The cubic root of 28973401 is about 307.1377221630.

The spelling of 28973401 in words is "twenty-eight million, nine hundred seventy-three thousand, four hundred one".