353640642 has 16 divisors (see below), whose sum is σ = 710635872. Its totient is φ = 117321120.

The previous prime is 353640593. The next prime is 353640649. The reversal of 353640642 is 246046353.

It is not an unprimeable number, because it can be changed into a prime (353640649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138403 + ... + 140934.

It is an arithmetic number, because the mean of its divisors is an integer number (44414742).

Almost surely, 2^353640642 is an apocalyptic number.

353640642 is an abundant number, since it is smaller than the sum of its proper divisors (356995230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

353640642 is a wasteful number, since it uses less digits than its factorization.

353640642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279553.

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 353640642 is about 18805.3354662979. The cubic root of 353640642 is about 707.1649440067.

Adding to 353640642 its reverse (246046353), we get a palindrome (599686995).

The spelling of 353640642 in words is "three hundred fifty-three million, six hundred forty thousand, six hundred forty-two".