7426986 has 64 divisors (see below), whose sum is σ = 18385920. Its totient is φ = 1952640.

The previous prime is 7426981. The next prime is 7427009. The reversal of 7426986 is 6896247.

7426986 = 30² + 31² + ... + 281².

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7426981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32605 + ... + 32831.

It is an arithmetic number, because the mean of its divisors is an integer number (287280).

Almost surely, 2^7426986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7426986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9192960).

7426986 is an abundant number, since it is smaller than the sum of its proper divisors (10958934).

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

7426986 is a wasteful number, since it uses less digits than its factorization.

7426986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299.

The product of its digits is 145152, while the sum is 42.

The square root of 7426986 is about 2725.2497133290. The cubic root of 7426986 is about 195.1061092456.

The spelling of 7426986 in words is "seven million, four hundred twenty-six thousand, nine hundred eighty-six".