2170990 has 16 divisors (see below), whose sum is σ = 3972960. Its totient is φ = 853920.

The previous prime is 2170943. The next prime is 2171003. The reversal of 2170990 is 990712.

It is a congruent number.

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, 1170 + ... + 2389.

It is an arithmetic number, because the mean of its divisors is an integer number (248310).

2^2170990 is an apocalyptic number.

2170990 is a deficient number, since it is larger than the sum of its proper divisors (1801970).

2170990 is a wasteful number, since it uses less digits than its factorization.

2170990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3627.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 2170990 is about 1473.4279758441. The cubic root of 2170990 is about 129.4849443099.

It can be divided in two parts, 2170 and 990, that added together give a triangular number (3160 = T₇₉).

The spelling of 2170990 in words is "two million, one hundred seventy thousand, nine hundred ninety".