349293784 has 32 divisors (see below), whose sum is σ = 749088000. Its totient is φ = 149577120.

The previous prime is 349293767. The next prime is 349293787. The reversal of 349293784 is 487392943.

It is a happy number.

It is a super-3 number, since 3×349293784³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349293787) 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, 128067 + ... + 130765.

It is an arithmetic number, because the mean of its divisors is an integer number (23409000).

Almost surely, 2^349293784 is an apocalyptic number.

It is an amenable number.

349293784 is an abundant number, since it is smaller than the sum of its proper divisors (399794216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

349293784 is a wasteful number, since it uses less digits than its factorization.

349293784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5023 (or 5019 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 49.

The square root of 349293784 is about 18689.4029867195. The cubic root of 349293784 is about 704.2555621317.

The spelling of 349293784 in words is "three hundred forty-nine million, two hundred ninety-three thousand, seven hundred eighty-four".