403861381 has 12 divisors (see below), whose sum is σ = 512507520. Its totient is φ = 314696760.

The previous prime is 403861379. The next prime is 403861391. The reversal of 403861381 is 183168304.

It is not a de Polignac number, because 403861381 - 2¹ = 403861379 is a prime.

It is a super-2 number, since 2×403861381² = 326208030126454322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403861361) 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 11 ways as a sum of consecutive naturals, for example, 374101 + ... + 375178.

It is an arithmetic number, because the mean of its divisors is an integer number (42708960).

Almost surely, 2^403861381 is an apocalyptic number.

It is an amenable number.

403861381 is a deficient number, since it is larger than the sum of its proper divisors (108646139).

403861381 is a wasteful number, since it uses less digits than its factorization.

403861381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749304 (or 749297 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 403861381 is about 20096.3026698943. The cubic root of 403861381 is about 739.1696194374.

The spelling of 403861381 in words is "four hundred three million, eight hundred sixty-one thousand, three hundred eighty-one".