381577156 has 9 divisors (see below), whose sum is σ = 667828399. Its totient is φ = 190769044.

The previous prime is 381577103. The next prime is 381577159. The reversal of 381577156 is 651775183.

The square root of 381577156 is 19534.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×381577156² = 291202251962096672, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381577159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 34185 + ... + 43951.

Almost surely, 2^381577156 is an apocalyptic number.

381577156 is the 19534-th square number.

It is an amenable number.

381577156 is a deficient number, since it is larger than the sum of its proper divisors (286251243).

381577156 is an frugal number, since it uses more digits than its factorization.

381577156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19538 (or 9769 counting only the distinct ones).

The product of its digits is 176400, while the sum is 43.

The cubic root of 381577156 is about 725.3163302908.

Multiplying 381577156 by its product of digits (176400), we get a square (67310210318400 = 8204280²).

The spelling of 381577156 in words is "three hundred eighty-one million, five hundred seventy-seven thousand, one hundred fifty-six".