2778250 has 16 divisors (see below), whose sum is σ = 5201352. Its totient is φ = 1111200.

The previous prime is 2778241. The next prime is 2778257. The reversal of 2778250 is 528772.

It can be written as a sum of positive squares in 4 ways, for example, as 124609 + 2653641 = 353^2 + 1629^2 .

It is a super-3 number, since 3×2778250³ = 64333210307671875000, which contains 333 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2778257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5307 + ... + 5806.

2^2778250 is an apocalyptic number.

2778250 is a deficient number, since it is larger than the sum of its proper divisors (2423102).

2778250 is a wasteful number, since it uses less digits than its factorization.

2778250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11130 (or 11120 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 2778250 is about 1666.8083273130. The cubic root of 2778250 is about 140.5800761852.

The spelling of 2778250 in words is "two million, seven hundred seventy-eight thousand, two hundred fifty".