404858421 has 36 divisors (see below), whose sum is σ = 648333504. Its totient is φ = 241441200.

The previous prime is 404858407. The next prime is 404858431. The reversal of 404858421 is 124858404.

It is not a de Polignac number, because 404858421 - 2¹⁵ = 404825653 is a prime.

It is a super-2 number, since 2×404858421² = 327820682109226482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404858431) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 443956 + ... + 444866.

It is an arithmetic number, because the mean of its divisors is an integer number (18009264).

Almost surely, 2^404858421 is an apocalyptic number.

It is an amenable number.

404858421 is a deficient number, since it is larger than the sum of its proper divisors (243475083).

404858421 is a wasteful number, since it uses less digits than its factorization.

404858421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062 (or 992 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

The square root of 404858421 is about 20121.0939314939. The cubic root of 404858421 is about 739.7773989575. Note that the first 3 decimals are identical.

The spelling of 404858421 in words is "four hundred four million, eight hundred fifty-eight thousand, four hundred twenty-one".