7025986638 has 96 divisors (see below), whose sum is σ = 16833173760. Its totient is φ = 2100286080.

The previous prime is 7025986633. The next prime is 7025986651. The reversal of 7025986638 is 8366895207.

It is a happy number.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7025986633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4854831 + ... + 4856277.

It is an arithmetic number, because the mean of its divisors is an integer number (175345560).

Almost surely, 2^7025986638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7025986638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8416586880).

7025986638 is an abundant number, since it is smaller than the sum of its proper divisors (9807187122).

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

7025986638 is a wasteful number, since it uses less digits than its factorization.

7025986638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782 (or 1779 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The square root of 7025986638 is about 83821.1586534092. The cubic root of 7025986638 is about 1915.2954333359.

The spelling of 7025986638 in words is "seven billion, twenty-five million, nine hundred eighty-six thousand, six hundred thirty-eight".