349456690 has 16 divisors (see below), whose sum is σ = 686206080. Its totient is φ = 127075120.

The previous prime is 349456673. The next prime is 349456691. The reversal of 349456690 is 96654943.

It is a super-2 number, since 2×349456690² = 244239956371512200, 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 349456690.

It is not an unprimeable number, because it can be changed into a prime (349456691) 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, 1588330 + ... + 1588549.

It is an arithmetic number, because the mean of its divisors is an integer number (42887880).

Almost surely, 2^349456690 is an apocalyptic number.

349456690 is a deficient number, since it is larger than the sum of its proper divisors (336749390).

349456690 is a wasteful number, since it uses less digits than its factorization.

349456690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176897.

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 349456690 is about 18693.7607238351. The cubic root of 349456690 is about 704.3650302744.

The spelling of 349456690 in words is "three hundred forty-nine million, four hundred fifty-six thousand, six hundred ninety".