2780234 has 4 divisors (see below), whose sum is σ = 4170354. Its totient is φ = 1390116.

The previous prime is 2780233. The next prime is 2780243. The reversal of 2780234 is 4320872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2739025 + 41209 = 1655^2 + 203^2 .

It is a super-3 number, since 3×2780234³ = 64471133380433558712, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2780233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695057 + ... + 695060.

2^2780234 is an apocalyptic number.

2780234 is a deficient number, since it is larger than the sum of its proper divisors (1390120).

2780234 is a wasteful number, since it uses less digits than its factorization.

2780234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390119.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 2780234 is about 1667.4033705136. The cubic root of 2780234 is about 140.6135318384.

The spelling of 2780234 in words is "two million, seven hundred eighty thousand, two hundred thirty-four".