2999780 has 36 divisors (see below), whose sum is σ = 7330428. Its totient is φ = 1028160.

The previous prime is 2999767. The next prime is 2999783. The reversal of 2999780 is 879992.

It can be written as a sum of positive squares in 2 ways, for example, as 2119936 + 879844 = 1456^2 + 938^2 .

It is not an unprimeable number, because it can be changed into a prime (2999783) 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, 551 + ... + 2510.

It is an arithmetic number, because the mean of its divisors is an integer number (203623).

2^2999780 is an apocalyptic number.

2999780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2999780 is an abundant number, since it is smaller than the sum of its proper divisors (4330648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2999780 is a wasteful number, since it uses less digits than its factorization.

2999780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084 (or 3075 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 2999780 is about 1731.9872978749. The cubic root of 2999780 is about 144.2214314456.

Adding to 2999780 its sum of digits (44), we get a square (2999824 = 1732²).

The spelling of 2999780 in words is "two million, nine hundred ninety-nine thousand, seven hundred eighty".