6915090 has 128 divisors (see below), whose sum is σ = 21772800. Its totient is φ = 1363968.

The previous prime is 6915067. The next prime is 6915091. The reversal of 6915090 is 905196.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6915091) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46336 + ... + 46484.

It is an arithmetic number, because the mean of its divisors is an integer number (170100).

Almost surely, 2^6915090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6915090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10886400).

6915090 is an abundant number, since it is smaller than the sum of its proper divisors (14857710).

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

6915090 is a wasteful number, since it uses less digits than its factorization.

6915090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 6915090 is about 2629.6558710219. The cubic root of 6915090 is about 190.5165078247.

The spelling of 6915090 in words is "six million, nine hundred fifteen thousand, ninety".