406389441 has 16 divisors (see below), whose sum is σ = 562700160. Its totient is φ = 260574720.

The previous prime is 406389433. The next prime is 406389449. The reversal of 406389441 is 144983604.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (406389433) and next prime (406389449).

It is not a de Polignac number, because 406389441 - 2³ = 406389433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 406389441.

It is not an unprimeable number, because it can be changed into a prime (406389449) 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, 14001 + ... + 31761.

It is an arithmetic number, because the mean of its divisors is an integer number (35168760).

Almost surely, 2^406389441 is an apocalyptic number.

It is an amenable number.

406389441 is a deficient number, since it is larger than the sum of its proper divisors (156310719).

406389441 is a wasteful number, since it uses less digits than its factorization.

406389441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18056.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 406389441 is about 20159.1031794572. The cubic root of 406389441 is about 740.7087445193.

The spelling of 406389441 in words is "four hundred six million, three hundred eighty-nine thousand, four hundred forty-one".