380651881 has 4 divisors (see below), whose sum is σ = 380736000. Its totient is φ = 380567764.

The previous prime is 380651851. The next prime is 380651891. The reversal of 380651881 is 188156083.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 188156083 = 599 ⋅314117.

It is a cyclic number.

It is not a de Polignac number, because 380651881 - 2⁷ = 380651753 is a prime.

It is a super-2 number, since 2×380651881² = 289791709017676322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (380651851) 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 3 ways as a sum of consecutive naturals, for example, 34861 + ... + 44458.

It is an arithmetic number, because the mean of its divisors is an integer number (95184000).

Almost surely, 2^380651881 is an apocalyptic number.

It is an amenable number.

380651881 is a deficient number, since it is larger than the sum of its proper divisors (84119).

380651881 is an equidigital number, since it uses as much as digits as its factorization.

380651881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84118.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 380651881 is about 19510.3019197551. The cubic root of 380651881 is about 724.7295898408.

The spelling of 380651881 in words is "three hundred eighty million, six hundred fifty-one thousand, eight hundred eighty-one".