2278734 has 16 divisors (see below), whose sum is σ = 4572288. Its totient is φ = 757112.

The previous prime is 2278729. The next prime is 2278747. The reversal of 2278734 is 4378722.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2278695 and 2278704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3199 + ... + 3845.

It is an arithmetic number, because the mean of its divisors is an integer number (285768).

2^2278734 is an apocalyptic number.

2278734 is an abundant number, since it is smaller than the sum of its proper divisors (2293554).

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

2278734 is a wasteful number, since it uses less digits than its factorization.

2278734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239.

The product of its digits is 18816, while the sum is 33.

The square root of 2278734 is about 1509.5476143534. The cubic root of 2278734 is about 131.5925221251.

The spelling of 2278734 in words is "two million, two hundred seventy-eight thousand, seven hundred thirty-four".