6406290 has 80 divisors (see below), whose sum is σ = 18817920. Its totient is φ = 1550880.

The previous prime is 6406247. The next prime is 6406307. The reversal of 6406290 is 926046.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8551 + ... + 9269.

It is an arithmetic number, because the mean of its divisors is an integer number (235224).

Almost surely, 2^6406290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6406290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9408960).

6406290 is an abundant number, since it is smaller than the sum of its proper divisors (12411630).

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

6406290 is a wasteful number, since it uses less digits than its factorization.

6406290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 740 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 6406290 is about 2531.0649932390. The cubic root of 6406290 is about 185.7243575828.

The spelling of 6406290 in words is "six million, four hundred six thousand, two hundred ninety".