340561780 has 96 divisors (see below), whose sum is σ = 794011680. Its totient is φ = 121927680.

The previous prime is 340561733. The next prime is 340561783. The reversal of 340561780 is 87165043.

It can be written as a sum of positive squares in 16 ways, for example, as 89529444 + 251032336 = 9462^2 + 15844^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340561783) 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, 1728642 + ... + 1728838.

It is an arithmetic number, because the mean of its divisors is an integer number (8270955).

Almost surely, 2^340561780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 340561780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (397005840).

340561780 is an abundant number, since it is smaller than the sum of its proper divisors (453449900).

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

340561780 is a wasteful number, since it uses less digits than its factorization.

340561780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 340561780 is about 18454.3160263392. The cubic root of 340561780 is about 698.3374011582.

The spelling of 340561780 in words is "three hundred forty million, five hundred sixty-one thousand, seven hundred eighty".