872090 has 16 divisors (see below), whose sum is σ = 1612872. Its totient is φ = 339264.

The previous prime is 872089. The next prime is 872099. The reversal of 872090 is 90278.

It can be written as a sum of positive squares in 4 ways, for example, as 734449 + 137641 = 857^2 + 371^2 .

It is not an unprimeable number, because it can be changed into a prime (872099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809 + ... + 1548.

2⁸⁷²⁰⁹⁰ is an apocalyptic number.

872090 is a deficient number, since it is larger than the sum of its proper divisors (740782).

872090 is a wasteful number, since it uses less digits than its factorization.

872090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 872090 is about 933.8575908563. The cubic root of 872090 is about 95.5404103353.

The spelling of 872090 in words is "eight hundred seventy-two thousand, ninety".