349421390 has 16 divisors (see below), whose sum is σ = 633182400. Its totient is φ = 138829920.

The previous prime is 349421357. The next prime is 349421431. The reversal of 349421390 is 93124943.

It is a self number, because there is not a number n which added to its sum of digits gives 349421390.

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, 115766 + ... + 118745.

It is an arithmetic number, because the mean of its divisors is an integer number (39573900).

Almost surely, 2^349421390 is an apocalyptic number.

349421390 is a deficient number, since it is larger than the sum of its proper divisors (283761010).

349421390 is a wasteful number, since it uses less digits than its factorization.

349421390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234667.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 349421390 is about 18692.8165347012. The cubic root of 349421390 is about 704.3413125782.

The spelling of 349421390 in words is "three hundred forty-nine million, four hundred twenty-one thousand, three hundred ninety".