406803390 has 192 divisors, whose sum is σ = 1197711360. Its totient is φ = 88058880.

The previous prime is 406803389. The next prime is 406803391. The reversal of 406803390 is 93308604.

It is an interprime number because it is at equal distance from previous prime (406803389) and next prime (406803391).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406803391) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3599974 + ... + 3600086.

It is an arithmetic number, because the mean of its divisors is an integer number (6238080).

Almost surely, 2^406803390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 406803390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598855680).

406803390 is an abundant number, since it is smaller than the sum of its proper divisors (790907970).

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

406803390 is a wasteful number, since it uses less digits than its factorization.

406803390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 406803390 is about 20169.3676152724. The cubic root of 406803390 is about 740.9601549199.

The spelling of 406803390 in words is "four hundred six million, eight hundred three thousand, three hundred ninety".