28572373 has 4 divisors (see below), whose sum is σ = 28678860. Its totient is φ = 28465888.

The previous prime is 28572347. The next prime is 28572391. The reversal of 28572373 is 37327582.

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 2745649 + 25826724 = 1657^2 + 5082^2 .

It is a cyclic number.

It is not a de Polignac number, because 28572373 - 2²¹ = 26475221 is a prime.

It is a super-2 number, since 2×28572373² = 1632760997702258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28572073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52840 + ... + 53377.

It is an arithmetic number, because the mean of its divisors is an integer number (7169715).

Almost surely, 2^28572373 is an apocalyptic number.

It is an amenable number.

28572373 is a deficient number, since it is larger than the sum of its proper divisors (106487).

28572373 is a wasteful number, since it uses less digits than its factorization.

28572373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106486.

The product of its digits is 70560, while the sum is 37.

The square root of 28572373 is about 5345.3131807220. The cubic root of 28572373 is about 305.7140771183.

The spelling of 28572373 in words is "twenty-eight million, five hundred seventy-two thousand, three hundred seventy-three".