2987831 has 8 divisors (see below), whose sum is σ = 3725184. Its totient is φ = 2328120.

The previous prime is 2987827. The next prime is 2987839. The reversal of 2987831 is 1387892.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2987831 - 2² = 2987827 is a prime.

It is a super-2 number, since 2×2987831² = 17854268169122, 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 (2987839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19325 + ... + 19478.

It is an arithmetic number, because the mean of its divisors is an integer number (465648).

2^2987831 is an apocalyptic number.

2987831 is a deficient number, since it is larger than the sum of its proper divisors (737353).

2987831 is a wasteful number, since it uses less digits than its factorization.

2987831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38821.

The product of its digits is 24192, while the sum is 38.

The square root of 2987831 is about 1728.5343502517. The cubic root of 2987831 is about 144.0296845953.

The spelling of 2987831 in words is "two million, nine hundred eighty-seven thousand, eight hundred thirty-one".