915090 has 64 divisors (see below), whose sum is σ = 2488320. Its totient is φ = 213440.

The previous prime is 915071. The next prime is 915113. The reversal of 915090 is 90519.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 915090.

It is a congruent number.

It is an unprimeable number.

915090 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 31 ways as a sum of consecutive naturals, for example, 15481 + ... + 15539.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2⁹¹⁵⁰⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 915090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1244160).

915090 is an abundant number, since it is smaller than the sum of its proper divisors (1573230).

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

915090 is a wasteful number, since it uses less digits than its factorization.

915090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127.

The product of its (nonzero) digits is 405, while the sum is 24.

The square root of 915090 is about 956.6033660823. The cubic root of 915090 is about 97.0855517595.

The spelling of 915090 in words is "nine hundred fifteen thousand, ninety".