28034001 has 6 divisors (see below), whose sum is σ = 40493570. Its totient is φ = 18689328.

The previous prime is 28033991. The next prime is 28034009. The reversal of 28034001 is 10043082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17438976 + 10595025 = 4176^2 + 3255^2 .

It is not a de Polignac number, because 28034001 - 2¹⁸ = 27771857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28034009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1557436 + ... + 1557453.

Almost surely, 2^28034001 is an apocalyptic number.

It is an amenable number.

28034001 is a deficient number, since it is larger than the sum of its proper divisors (12459569).

28034001 is a wasteful number, since it uses less digits than its factorization.

28034001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3114895 (or 3114892 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 28034001 is about 5294.7144398919. The cubic root of 28034001 is about 303.7817606377.

Adding to 28034001 its reverse (10043082), we get a palindrome (38077083).

The spelling of 28034001 in words is "twenty-eight million, thirty-four thousand, one".