28573001 has 6 divisors (see below), whose sum is σ = 28869006. Its totient is φ = 28280000.

The previous prime is 28572983. The next prime is 28573009. The reversal of 28573001 is 10037582.

It can be written as a sum of positive squares in 3 ways, for example, as 19811401 + 8761600 = 4451^2 + 2960^2 .

It is not a de Polignac number, because 28573001 - 2¹⁸ = 28310857 is a prime.

It is a super-2 number, since 2×28573001² = 1632832772292002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28573009) 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, 8801 + ... + 11601.

It is an arithmetic number, because the mean of its divisors is an integer number (4811501).

Almost surely, 2^28573001 is an apocalyptic number.

It is an amenable number.

28573001 is a deficient number, since it is larger than the sum of its proper divisors (296005).

28573001 is an equidigital number, since it uses as much as digits as its factorization.

28573001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003 (or 2902 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 28573001 is about 5345.3719234493. The cubic root of 28573001 is about 305.7163168930.

The spelling of 28573001 in words is "twenty-eight million, five hundred seventy-three thousand, one".