2278730 has 8 divisors (see below), whose sum is σ = 4101732. Its totient is φ = 911488.

The previous prime is 2278729. The next prime is 2278747. The reversal of 2278730 is 378722.

It can be written as a sum of positive squares in 2 ways, for example, as 1852321 + 426409 = 1361^2 + 653^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2278730² = 10385220825800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2278693 and 2278702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113927 + ... + 113946.

2^2278730 is an apocalyptic number.

2278730 is a deficient number, since it is larger than the sum of its proper divisors (1823002).

2278730 is a wasteful number, since it uses less digits than its factorization.

2278730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227880.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 2278730 is about 1509.5462894526. The cubic root of 2278730 is about 131.5924451276.

The spelling of 2278730 in words is "two million, two hundred seventy-eight thousand, seven hundred thirty".