381187730 has 64 divisors (see below), whose sum is σ = 862202880. Its totient is φ = 117873600.

The previous prime is 381187693. The next prime is 381187739. The reversal of 381187730 is 37781183.

It is not an unprimeable number, because it can be changed into a prime (381187739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98981 + ... + 102759.

It is an arithmetic number, because the mean of its divisors is an integer number (13471920).

Almost surely, 2^381187730 is an apocalyptic number.

381187730 is an abundant number, since it is smaller than the sum of its proper divisors (481015150).

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

381187730 is a wasteful number, since it uses less digits than its factorization.

381187730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 381187730 is about 19524.0295533478. The cubic root of 381187730 is about 725.0695010661.

The spelling of 381187730 in words is "three hundred eighty-one million, one hundred eighty-seven thousand, seven hundred thirty".