404774381 has 4 divisors (see below), whose sum is σ = 441572064. Its totient is φ = 367976700.

The previous prime is 404774371. The next prime is 404774389. The reversal of 404774381 is 183477404.

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.

It is a cyclic number.

It is not a de Polignac number, because 404774381 - 2²² = 400580077 is a prime.

It is a super-2 number, since 2×404774381² = 327684599027866322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404774389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18398825 + ... + 18398846.

It is an arithmetic number, because the mean of its divisors is an integer number (110393016).

Almost surely, 2^404774381 is an apocalyptic number.

It is an amenable number.

404774381 is a deficient number, since it is larger than the sum of its proper divisors (36797683).

404774381 is a wasteful number, since it uses less digits than its factorization.

404774381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36797682.

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 404774381 is about 20119.0054674678. The cubic root of 404774381 is about 739.7262080623.

The spelling of 404774381 in words is "four hundred four million, seven hundred seventy-four thousand, three hundred eighty-one".