2899978 has 12 divisors (see below), whose sum is σ = 4548978. Its totient is φ = 1386440.

The previous prime is 2899943. The next prime is 2899991. The reversal of 2899978 is 8799982.

It can be written as a sum of positive squares in only one way, i.e., 2666689 + 233289 = 1633^2 + 483^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 313 + ... + 2428.

2^2899978 is an apocalyptic number.

2899978 is a deficient number, since it is larger than the sum of its proper divisors (1649000).

2899978 is a wasteful number, since it uses less digits than its factorization.

2899978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2789 (or 2766 counting only the distinct ones).

The product of its digits is 653184, while the sum is 52.

The square root of 2899978 is about 1702.9321771580. The cubic root of 2899978 is about 142.6039541047.

The spelling of 2899978 in words is "two million, eight hundred ninety-nine thousand, nine hundred seventy-eight".