381781972 has 48 divisors (see below), whose sum is σ = 826257600. Its totient is φ = 151752960.

The previous prime is 381781943. The next prime is 381781973. The reversal of 381781972 is 279187183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381781973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6697 + ... + 28432.

It is an arithmetic number, because the mean of its divisors is an integer number (17213700).

Almost surely, 2^381781972 is an apocalyptic number.

It is an amenable number.

381781972 is an abundant number, since it is smaller than the sum of its proper divisors (444475628).

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

381781972 is a wasteful number, since it uses less digits than its factorization.

381781972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35176 (or 35174 counting only the distinct ones).

The product of its digits is 169344, while the sum is 46.

The square root of 381781972 is about 19539.2418481373. The cubic root of 381781972 is about 725.4460810854.

The spelling of 381781972 in words is "three hundred eighty-one million, seven hundred eighty-one thousand, nine hundred seventy-two".