1913538 has 32 divisors (see below), whose sum is σ = 4239360. Its totient is φ = 570960.

The previous prime is 1913533. The next prime is 1913539. The reversal of 1913538 is 8353191.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1913533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5031 + ... + 5397.

It is an arithmetic number, because the mean of its divisors is an integer number (132480).

2^1913538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1913538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2119680).

1913538 is an abundant number, since it is smaller than the sum of its proper divisors (2325822).

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

1913538 is a wasteful number, since it uses less digits than its factorization.

1913538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462.

The product of its digits is 3240, while the sum is 30.

The square root of 1913538 is about 1383.3069073781. The cubic root of 1913538 is about 124.1497064553.

The spelling of 1913538 in words is "one million, nine hundred thirteen thousand, five hundred thirty-eight".