346640457 has 16 divisors (see below), whose sum is σ = 477726272. Its totient is φ = 223404480.

The previous prime is 346640449. The next prime is 346640467. The reversal of 346640457 is 754046643.

It is a happy number.

It is not a de Polignac number, because 346640457 - 2³ = 346640449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (346640407) 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 15 ways as a sum of consecutive naturals, for example, 7482 + ... + 27372.

It is an arithmetic number, because the mean of its divisors is an integer number (29857892).

Almost surely, 2^346640457 is an apocalyptic number.

346640457 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

346640457 is a deficient number, since it is larger than the sum of its proper divisors (131085815).

346640457 is a wasteful number, since it uses less digits than its factorization.

346640457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20088.

The product of its (nonzero) digits is 241920, while the sum is 39.

The square root of 346640457 is about 18618.2828692659. The cubic root of 346640457 is about 702.4677911466.

The spelling of 346640457 in words is "three hundred forty-six million, six hundred forty thousand, four hundred fifty-seven".