406503385240 has 32 divisors (see below), whose sum is σ = 917573585760. Its totient is φ = 162078515200.

The previous prime is 406503385193. The next prime is 406503385273. The reversal of 406503385240 is 42583305604.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 406503385193 and 406503385202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16326121 + ... + 16351000.

It is an arithmetic number, because the mean of its divisors is an integer number (28674174555).

Almost surely, 2^406503385240 is an apocalyptic number.

406503385240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

406503385240 is an abundant number, since it is smaller than the sum of its proper divisors (511070200520).

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

406503385240 is a wasteful number, since it uses less digits than its factorization.

406503385240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32677443 (or 32677439 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 406503385240 in words is "four hundred six billion, five hundred three million, three hundred eighty-five thousand, two hundred forty".