340400817 has 12 divisors (see below), whose sum is σ = 491871744. Its totient is φ = 226850040.

The previous prime is 340400807. The next prime is 340400833. The reversal of 340400817 is 718004043.

It is not a de Polignac number, because 340400817 - 2⁷ = 340400689 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (340400807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27888 + ... + 38190.

It is an arithmetic number, because the mean of its divisors is an integer number (40989312).

Almost surely, 2^340400817 is an apocalyptic number.

It is an amenable number.

340400817 is a deficient number, since it is larger than the sum of its proper divisors (151470927).

340400817 is a wasteful number, since it uses less digits than its factorization.

340400817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13980 (or 13977 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 340400817 is about 18449.9543901875. The cubic root of 340400817 is about 698.2273631723.

It can be divided in two parts, 3404008 and 17, that added together give a square (3404025 = 1845²).

The spelling of 340400817 in words is "three hundred forty million, four hundred thousand, eight hundred seventeen".