381436720 has 40 divisors (see below), whose sum is σ = 1013533344. Its totient is φ = 130778112.

The previous prime is 381436717. The next prime is 381436729. The reversal of 381436720 is 27634183.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (381436729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340009 + ... + 341128.

Almost surely, 2^381436720 is an apocalyptic number.

It is an amenable number.

381436720 is an abundant number, since it is smaller than the sum of its proper divisors (632096624).

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

381436720 is a wasteful number, since it uses less digits than its factorization.

381436720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681157 (or 681151 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 381436720 is about 19530.4050137216. The cubic root of 381436720 is about 725.2273373472.

The spelling of 381436720 in words is "three hundred eighty-one million, four hundred thirty-six thousand, seven hundred twenty".