340397057 has 16 divisors (see below), whose sum is σ = 457037952. Its totient is φ = 244840320.

The previous prime is 340397011. The next prime is 340397059. The reversal of 340397057 is 750793043.

It is a cyclic number.

It is not a de Polignac number, because 340397057 - 2¹⁶ = 340331521 is a prime.

It is a super-2 number, since 2×340397057² = 231740312828522498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 340397057.

It is not an unprimeable number, because it can be changed into a prime (340397059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169028 + ... + 171029.

It is an arithmetic number, because the mean of its divisors is an integer number (28564872).

Almost surely, 2^340397057 is an apocalyptic number.

It is an amenable number.

340397057 is a deficient number, since it is larger than the sum of its proper divisors (116640895).

340397057 is a wasteful number, since it uses less digits than its factorization.

340397057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340088.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 340397057 is about 18449.8524926353. The cubic root of 340397057 is about 698.2247923358.

The spelling of 340397057 in words is "three hundred forty million, three hundred ninety-seven thousand, fifty-seven".