406660890 has 64 divisors (see below), whose sum is σ = 1003622400. Its totient is φ = 105397824.

The previous prime is 406660867. The next prime is 406660901. The reversal of 406660890 is 98066604.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 307651 + ... + 308969.

It is an arithmetic number, because the mean of its divisors is an integer number (15681600).

Almost surely, 2^406660890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 406660890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501811200).

406660890 is an abundant number, since it is smaller than the sum of its proper divisors (596961510).

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

406660890 is a wasteful number, since it uses less digits than its factorization.

406660890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 406660890 is about 20165.8347211317. The cubic root of 406660890 is about 740.8736273280.

The spelling of 406660890 in words is "four hundred six million, six hundred sixty thousand, eight hundred ninety".