381216072 has 16 divisors (see below), whose sum is σ = 953040240. Its totient is φ = 127072016.

The previous prime is 381216037. The next prime is 381216091. The reversal of 381216072 is 270612183.

It is a super-2 number, since 2×381216072² = 290651387102218368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7941978 + ... + 7942025.

It is an arithmetic number, because the mean of its divisors is an integer number (59565015).

Almost surely, 2^381216072 is an apocalyptic number.

It is an amenable number.

381216072 is an abundant number, since it is smaller than the sum of its proper divisors (571824168).

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

381216072 is a wasteful number, since it uses less digits than its factorization.

381216072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15884012 (or 15884008 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 381216072 is about 19524.7553633842. The cubic root of 381216072 is about 725.0874706988.

The spelling of 381216072 in words is "three hundred eighty-one million, two hundred sixteen thousand, seventy-two".