406004440 has 32 divisors (see below), whose sum is σ = 916832880. Its totient is φ = 161811072.

The previous prime is 406004419. The next prime is 406004449. The reversal of 406004440 is 44400604.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406004449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7242 + ... + 29401.

Almost surely, 2^406004440 is an apocalyptic number.

406004440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

406004440 is an abundant number, since it is smaller than the sum of its proper divisors (510828440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

406004440 is a wasteful number, since it uses less digits than its factorization.

406004440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36931 (or 36927 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 406004440 is about 20149.5518560587. The cubic root of 406004440 is about 740.4747623001.

The spelling of 406004440 in words is "four hundred six million, four thousand, four hundred forty".