349857400 has 24 divisors (see below), whose sum is σ = 813418920. Its totient is φ = 139942880.

The previous prime is 349857397. The next prime is 349857407. The reversal of 349857400 is 4758943.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349857407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 874444 + ... + 874843.

It is an arithmetic number, because the mean of its divisors is an integer number (33892455).

Almost surely, 2^349857400 is an apocalyptic number.

It is an amenable number.

349857400 is an abundant number, since it is smaller than the sum of its proper divisors (463561520).

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

349857400 is a wasteful number, since it uses less digits than its factorization.

349857400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749303 (or 1749294 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 349857400 is about 18704.4754002886. The cubic root of 349857400 is about 704.6341511769.

The spelling of 349857400 in words is "three hundred forty-nine million, eight hundred fifty-seven thousand, four hundred".