381937720 has 16 divisors (see below), whose sum is σ = 859359960. Its totient is φ = 152775072.

The previous prime is 381937711. The next prime is 381937727. The reversal of 381937720 is 27739183.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 9548443 = 381937720 / (3 + 8 + 1 + 9 + 3 + 7 + 7 + 2 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381937727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4774182 + ... + 4774261.

Almost surely, 2^381937720 is an apocalyptic number.

It is an amenable number.

381937720 is an abundant number, since it is smaller than the sum of its proper divisors (477422240).

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

381937720 is a wasteful number, since it uses less digits than its factorization.

381937720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9548454 (or 9548450 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 381937720 is about 19543.2269597423. The cubic root of 381937720 is about 725.5447162784.

The spelling of 381937720 in words is "three hundred eighty-one million, nine hundred thirty-seven thousand, seven hundred twenty".