349959815 has 8 divisors (see below), whose sum is σ = 420187920. Its totient is φ = 279810432.

The previous prime is 349959793. The next prime is 349959821. The reversal of 349959815 is 518959943.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 349959815 - 2¹⁸ = 349697671 is a prime.

It is a super-2 number, since 2×349959815² = 244943744229668450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9410 + ... + 28079.

It is an arithmetic number, because the mean of its divisors is an integer number (52523490).

Almost surely, 2^349959815 is an apocalyptic number.

349959815 is a deficient number, since it is larger than the sum of its proper divisors (70228105).

349959815 is a wasteful number, since it uses less digits than its factorization.

349959815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39361.

The product of its digits is 1749600, while the sum is 53.

The square root of 349959815 is about 18707.2129137400. The cubic root of 349959815 is about 704.7029011552.

The spelling of 349959815 in words is "three hundred forty-nine million, nine hundred fifty-nine thousand, eight hundred fifteen".