340813278 has 64 divisors (see below), whose sum is σ = 843796800. Its totient is φ = 101243520.

The previous prime is 340813271. The next prime is 340813303. The reversal of 340813278 is 872318043.

It is a super-2 number, since 2×340813278² = 232307380922210568, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340813271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11988 + ... + 28728.

It is an arithmetic number, because the mean of its divisors is an integer number (13184325).

Almost surely, 2^340813278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 340813278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421898400).

340813278 is an abundant number, since it is smaller than the sum of its proper divisors (502983522).

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

340813278 is a wasteful number, since it uses less digits than its factorization.

340813278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16794 (or 16788 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 340813278 is about 18461.1288387249. The cubic root of 340813278 is about 698.5092615514.

The spelling of 340813278 in words is "three hundred forty million, eight hundred thirteen thousand, two hundred seventy-eight".