2861930 has 16 divisors (see below), whose sum is σ = 5191560. Its totient is φ = 1135872.

The previous prime is 2861927. The next prime is 2861941. The reversal of 2861930 is 391682.

It can be written as a sum of positive squares in 4 ways, for example, as 2745649 + 116281 = 1657^2 + 341^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2861893 and 2861902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326 + ... + 2414.

2^2861930 is an apocalyptic number.

2861930 is a deficient number, since it is larger than the sum of its proper divisors (2329630).

2861930 is a wasteful number, since it uses less digits than its factorization.

2861930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2861930 is about 1691.7239727568. The cubic root of 2861930 is about 141.9775472005.

The spelling of 2861930 in words is "two million, eight hundred sixty-one thousand, nine hundred thirty".