2991530 has 16 divisors (see below), whose sum is σ = 5408424. Its totient is φ = 1191360.

The previous prime is 2991523. The next prime is 2991551. The reversal of 2991530 is 351992.

It can be written as a sum of positive squares in 4 ways, for example, as 2927521 + 64009 = 1711^2 + 253^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2991493 and 2991502.

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, 2420 + ... + 3440.

2^2991530 is an apocalyptic number.

2991530 is a deficient number, since it is larger than the sum of its proper divisors (2416894).

2991530 is a wasteful number, since it uses less digits than its factorization.

2991530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 2991530 is about 1729.6040009204. The cubic root of 2991530 is about 144.0890973818.

The spelling of 2991530 in words is "two million, nine hundred ninety-one thousand, five hundred thirty".