381247400 has 24 divisors (see below), whose sum is σ = 886400670. Its totient is φ = 152498880.

The previous prime is 381247387. The next prime is 381247411. The reversal of 381247400 is 4742183.

It can be written as a sum of positive squares in 3 ways, for example, as 334816804 + 46430596 = 18298^2 + 6814^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 952919 + ... + 953318.

Almost surely, 2^381247400 is an apocalyptic number.

It is an amenable number.

381247400 is an abundant number, since it is smaller than the sum of its proper divisors (505153270).

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

381247400 is a wasteful number, since it uses less digits than its factorization.

381247400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906253 (or 1906244 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 381247400 is about 19525.5576104756. The cubic root of 381247400 is about 725.1073325040.

Adding to 381247400 its reverse (4742183), we get a palindrome (385989583).

The spelling of 381247400 in words is "three hundred eighty-one million, two hundred forty-seven thousand, four hundred".