340406523 has 16 divisors (see below), whose sum is σ = 506278560. Its totient is φ = 226050048.

The previous prime is 340406501. The next prime is 340406537. The reversal of 340406523 is 325604043.

340406523 is a `hidden beast` number, since 3 + 4 + 0 + 4 + 0 + 652 + 3 = 666.

It is not a de Polignac number, because 340406523 - 2¹² = 340402427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (340406123) 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, 17590 + ... + 31467.

It is an arithmetic number, because the mean of its divisors is an integer number (31642410).

Almost surely, 2^340406523 is an apocalyptic number.

340406523 is a deficient number, since it is larger than the sum of its proper divisors (165872037).

340406523 is a wasteful number, since it uses less digits than its factorization.

340406523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49323 (or 49317 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 340406523 is about 18450.1090240681. The cubic root of 340406523 is about 698.2312645173.

The spelling of 340406523 in words is "three hundred forty million, four hundred six thousand, five hundred twenty-three".