349123990 has 16 divisors (see below), whose sum is σ = 641794752. Its totient is φ = 136678144.

The previous prime is 349123981. The next prime is 349123997. The reversal of 349123990 is 99321943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349123997) 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, 370939 + ... + 371878.

It is an arithmetic number, because the mean of its divisors is an integer number (40112172).

Almost surely, 2^349123990 is an apocalyptic number.

349123990 is a deficient number, since it is larger than the sum of its proper divisors (292670762).

349123990 is a wasteful number, since it uses less digits than its factorization.

349123990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742871.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 349123990 is about 18684.8599138447. The cubic root of 349123990 is about 704.1414292197.

The spelling of 349123990 in words is "three hundred forty-nine million, one hundred twenty-three thousand, nine hundred ninety".