406290 has 32 divisors (see below), whose sum is σ = 1010880. Its totient is φ = 104384.

The previous prime is 406271. The next prime is 406309. The reversal of 406290 is 92604.

It is an interprime number because it is at equal distance from previous prime (406271) and next prime (406309).

It is an unprimeable number.

406290 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 637 + ... + 1103.

It is an arithmetic number, because the mean of its divisors is an integer number (31590).

2⁴⁰⁶²⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 406290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505440).

406290 is an abundant number, since it is smaller than the sum of its proper divisors (604590).

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

406290 is a wasteful number, since it uses less digits than its factorization.

406290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 406290 is about 637.4088170084. The cubic root of 406290 is about 74.0648323964.

Adding to 406290 its reverse (92604), we get a palindrome (498894).

It can be divided in two parts, 406 and 290, that added together give a palindrome (696).

The spelling of 406290 in words is "four hundred six thousand, two hundred ninety".