406818140 has 12 divisors (see below), whose sum is σ = 854318136. Its totient is φ = 162727248.

The previous prime is 406818121. The next prime is 406818149. The reversal of 406818140 is 41818604.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 406818097 and 406818106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406818149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10170434 + ... + 10170473.

It is an arithmetic number, because the mean of its divisors is an integer number (71193178).

Almost surely, 2^406818140 is an apocalyptic number.

It is an amenable number.

406818140 is an abundant number, since it is smaller than the sum of its proper divisors (447499996).

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

406818140 is a wasteful number, since it uses less digits than its factorization.

406818140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20340916 (or 20340914 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 406818140 is about 20169.7332654649. The cubic root of 406818140 is about 740.9691101306.

The spelling of 406818140 in words is "four hundred six million, eight hundred eighteen thousand, one hundred forty".