349509915 has 24 divisors (see below), whose sum is σ = 612070368. Its totient is φ = 184481280.

The previous prime is 349509913. The next prime is 349509949. The reversal of 349509915 is 519905943.

It is a happy number.

It is not a de Polignac number, because 349509915 - 2¹ = 349509913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (349509913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35671 + ... + 44400.

It is an arithmetic number, because the mean of its divisors is an integer number (25502932).

Almost surely, 2^349509915 is an apocalyptic number.

349509915 is a deficient number, since it is larger than the sum of its proper divisors (262560453).

349509915 is a wasteful number, since it uses less digits than its factorization.

349509915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80179 (or 80176 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 349509915 is about 18695.1842729618. The cubic root of 349509915 is about 704.4007885688.

The spelling of 349509915 in words is "three hundred forty-nine million, five hundred nine thousand, nine hundred fifteen".