913890 has 32 divisors (see below), whose sum is σ = 2249856. Its totient is φ = 237440.

The previous prime is 913889. The next prime is 913907. The reversal of 913890 is 98319.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 859 + ... + 1601.

It is an arithmetic number, because the mean of its divisors is an integer number (70308).

2⁹¹³⁸⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 913890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1124928).

913890 is an abundant number, since it is smaller than the sum of its proper divisors (1335966).

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

913890 is a wasteful number, since it uses less digits than its factorization.

913890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 913890 is about 955.9759411199. The cubic root of 913890 is about 97.0430955987.

The spelling of 913890 in words is "nine hundred thirteen thousand, eight hundred ninety".