406232540 has 72 divisors (see below), whose sum is σ = 1044645840. Its totient is φ = 131943168.

The previous prime is 406232513. The next prime is 406232573. The reversal of 406232540 is 45232604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7712 + ... + 29528.

It is an arithmetic number, because the mean of its divisors is an integer number (14508970).

Almost surely, 2^406232540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 406232540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522322920).

406232540 is an abundant number, since it is smaller than the sum of its proper divisors (638413300).

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

406232540 is a wasteful number, since it uses less digits than its factorization.

406232540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21859 (or 21850 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 406232540 is about 20155.2112367993. The cubic root of 406232540 is about 740.6134066562.

The spelling of 406232540 in words is "four hundred six million, two hundred thirty-two thousand, five hundred forty".