2878531 has 4 divisors (see below), whose sum is σ = 2898000. Its totient is φ = 2859064.

The previous prime is 2878451. The next prime is 2878537. The reversal of 2878531 is 1358782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2878531 - 2¹¹ = 2876483 is a prime.

It is a super-2 number, since 2×2878531² = 16571881435922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2878537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9511 + ... + 9808.

It is an arithmetic number, because the mean of its divisors is an integer number (724500).

2^2878531 is an apocalyptic number.

2878531 is a deficient number, since it is larger than the sum of its proper divisors (19469).

2878531 is a wasteful number, since it uses less digits than its factorization.

2878531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19468.

The product of its digits is 13440, while the sum is 34.

The square root of 2878531 is about 1696.6234113674. The cubic root of 2878531 is about 142.2515378977.

The spelling of 2878531 in words is "two million, eight hundred seventy-eight thousand, five hundred thirty-one".