406020660 has 48 divisors (see below), whose sum is σ = 1148594496. Its totient is φ = 107154432.

The previous prime is 406020649. The next prime is 406020661. The reversal of 406020660 is 66020604.

It is a self number, because there is not a number n which added to its sum of digits gives 406020660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406020661) 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, 29062 + ... + 40701.

It is an arithmetic number, because the mean of its divisors is an integer number (23929052).

Almost surely, 2^406020660 is an apocalyptic number.

It is an amenable number.

406020660 is an abundant number, since it is smaller than the sum of its proper divisors (742573836).

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

406020660 is a wasteful number, since it uses less digits than its factorization.

406020660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69872 (or 69870 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 406020660 is about 20149.9543423800. The cubic root of 406020660 is about 740.4846228990.

The spelling of 406020660 in words is "four hundred six million, twenty thousand, six hundred sixty".