381230720 has 64 divisors (see below), whose sum is σ = 981507240. Its totient is φ = 140759040.

The previous prime is 381230711. The next prime is 381230741. The reversal of 381230720 is 27032183.

It can be written as a sum of positive squares in 4 ways, for example, as 350138944 + 31091776 = 18712^2 + 5576^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 381230720.

It is an unprimeable number.

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, 14591 + ... + 31230.

Almost surely, 2^381230720 is an apocalyptic number.

It is an amenable number.

381230720 is an abundant number, since it is smaller than the sum of its proper divisors (600276520).

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

381230720 is a wasteful number, since it uses less digits than its factorization.

381230720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45853 (or 45841 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 381230720 is about 19525.1304733157. The cubic root of 381230720 is about 725.0967575976.

The spelling of 381230720 in words is "three hundred eighty-one million, two hundred thirty thousand, seven hundred twenty".