2943890 has 16 divisors (see below), whose sum is σ = 5611032. Its totient is φ = 1108224.

The previous prime is 2943887. The next prime is 2943911. The reversal of 2943890 is 983492.

It can be written as a sum of positive squares in 4 ways, for example, as 2900209 + 43681 = 1703^2 + 209^2 .

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 2943890.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8489 + ... + 8828.

2^2943890 is an apocalyptic number.

2943890 is a deficient number, since it is larger than the sum of its proper divisors (2667142).

2943890 is a wasteful number, since it uses less digits than its factorization.

2943890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17341.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 2943890 is about 1715.7767920100. The cubic root of 2943890 is about 143.3201297855.

It can be divided in two parts, 29 and 43890, that multiplied together give a triangular number (1272810 = T₁₅₉₅).

The spelling of 2943890 in words is "two million, nine hundred forty-three thousand, eight hundred ninety".