2827989 has 12 divisors (see below), whose sum is σ = 4108000. Its totient is φ = 1874664.

The previous prime is 2827987. The next prime is 2828053. The reversal of 2827989 is 9897282.

2827989 = T₅₉ + T₆₀ + ... + T₂₅₇.

It is not a de Polignac number, because 2827989 - 2¹ = 2827987 is a prime.

It is a Duffinian number.

2827989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2827987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1002 + ... + 2580.

2^2827989 is an apocalyptic number.

It is an amenable number.

2827989 is a deficient number, since it is larger than the sum of its proper divisors (1280011).

2827989 is a wasteful number, since it uses less digits than its factorization.

2827989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784 (or 1781 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 2827989 is about 1681.6625701965. The cubic root of 2827989 is about 141.4140537811.

Adding to 2827989 its product of digits (145152), we get a triangular number (2973141 = T₂₄₃₈).

The spelling of 2827989 in words is "two million, eight hundred twenty-seven thousand, nine hundred eighty-nine".