340821864 has 32 divisors (see below), whose sum is σ = 946728000. Its totient is φ = 113607216.

The previous prime is 340821799. The next prime is 340821869. The reversal of 340821864 is 468128043.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (340821869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 788724 + ... + 789155.

It is an arithmetic number, because the mean of its divisors is an integer number (29585250).

Almost surely, 2^340821864 is an apocalyptic number.

It is an amenable number.

340821864 is an abundant number, since it is smaller than the sum of its proper divisors (605906136).

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

340821864 is a wasteful number, since it uses less digits than its factorization.

340821864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577894 (or 1577884 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 340821864 is about 18461.3613799200. The cubic root of 340821864 is about 698.5151272756.

The spelling of 340821864 in words is "three hundred forty million, eight hundred twenty-one thousand, eight hundred sixty-four".