381212340 has 48 divisors (see below), whose sum is σ = 1069192320. Its totient is φ = 101485440.

The previous prime is 381212323. The next prime is 381212401. The reversal of 381212340 is 43212183.

It is a self number, because there is not a number n which added to its sum of digits gives 381212340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32826 + ... + 42894.

It is an arithmetic number, because the mean of its divisors is an integer number (22274840).

Almost surely, 2^381212340 is an apocalyptic number.

381212340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

381212340 is an abundant number, since it is smaller than the sum of its proper divisors (687979980).

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

381212340 is a wasteful number, since it uses less digits than its factorization.

381212340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10712 (or 10710 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 381212340 is about 19524.6597921705. The cubic root of 381212340 is about 725.0851045557.

The spelling of 381212340 in words is "three hundred eighty-one million, two hundred twelve thousand, three hundred forty".