868404381 has 16 divisors (see below), whose sum is σ = 1248253440. Its totient is φ = 533839680.

The previous prime is 868404377. The next prime is 868404389. The reversal of 868404381 is 183404868.

It is not a de Polignac number, because 868404381 - 2² = 868404377 is a prime.

It is a super-4 number, since 4×868404381⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868404389) 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, 27415 + ... + 49883.

It is an arithmetic number, because the mean of its divisors is an integer number (78015840).

Almost surely, 2^868404381 is an apocalyptic number.

It is an amenable number.

868404381 is a deficient number, since it is larger than the sum of its proper divisors (379849059).

868404381 is a wasteful number, since it uses less digits than its factorization.

868404381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23476.

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 868404381 is about 29468.7017189424. The cubic root of 868404381 is about 954.0562960946.

The spelling of 868404381 in words is "eight hundred sixty-eight million, four hundred four thousand, three hundred eighty-one".