349974780 has 48 divisors (see below), whose sum is σ = 983439744. Its totient is φ = 92992320.

The previous prime is 349974773. The next prime is 349974787. The reversal of 349974780 is 87479943.

It is a happy number.

349974780 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (349974773) and next prime (349974787).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349974787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6675 + ... + 27285.

It is an arithmetic number, because the mean of its divisors is an integer number (20488328).

Almost surely, 2^349974780 is an apocalyptic number.

349974780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

349974780 is an abundant number, since it is smaller than the sum of its proper divisors (633464964).

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

349974780 is a wasteful number, since it uses less digits than its factorization.

349974780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20906 (or 20904 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 349974780 is about 18707.6128888749. The cubic root of 349974780 is about 704.7129458595.

The spelling of 349974780 in words is "three hundred forty-nine million, nine hundred seventy-four thousand, seven hundred eighty".