340353657 has 60 divisors (see below), whose sum is σ = 612039780. Its totient is φ = 187717824.

The previous prime is 340353653. The next prime is 340353679. The reversal of 340353657 is 756353043.

It can be written as a sum of positive squares in 2 ways, for example, as 117418896 + 222934761 = 10836^2 + 14931^2 .

It is not a de Polignac number, because 340353657 - 2² = 340353653 is a prime.

It is a super-2 number, since 2×340353657² = 231681223666547298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (340353653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 113623 + ... + 116579.

It is an arithmetic number, because the mean of its divisors is an integer number (10200663).

Almost surely, 2^340353657 is an apocalyptic number.

It is an amenable number.

340353657 is a deficient number, since it is larger than the sum of its proper divisors (271686123).

340353657 is a wasteful number, since it uses less digits than its factorization.

340353657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012 (or 2996 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 36.

The square root of 340353657 is about 18448.6762939784. The cubic root of 340353657 is about 698.1951169481.

The spelling of 340353657 in words is "three hundred forty million, three hundred fifty-three thousand, six hundred fifty-seven".