340780 has 24 divisors (see below), whose sum is σ = 781200. Its totient is φ = 123840.

The previous prime is 340777. The next prime is 340787. The reversal of 340780 is 87043.

It is a super-4 number, since 4×340780⁴ (a number of 23 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555 + ... + 994.

It is an arithmetic number, because the mean of its divisors is an integer number (32550).

It is the magic constant of a 88 × 88 magic square.

2³⁴⁰⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

340780 is an abundant number, since it is smaller than the sum of its proper divisors (440420).

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

340780 is a wasteful number, since it uses less digits than its factorization.

340780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569 (or 1567 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 340780 is about 583.7636508040. The cubic root of 340780 is about 69.8486525986.

The spelling of 340780 in words is "three hundred forty thousand, seven hundred eighty".