7981902 has 40 divisors (see below), whose sum is σ = 18513000. Its totient is φ = 2567376.

The previous prime is 7981889. The next prime is 7981907. The reversal of 7981902 is 2091897.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7981907) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3849 + ... + 5547.

It is an arithmetic number, because the mean of its divisors is an integer number (462825).

Almost surely, 2^7981902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7981902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9256500).

7981902 is an abundant number, since it is smaller than the sum of its proper divisors (10531098).

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

7981902 is a wasteful number, since it uses less digits than its factorization.

7981902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742 (or 1733 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 7981902 is about 2825.2260086584. The cubic root of 7981902 is about 199.8490694618.

The spelling of 7981902 in words is "seven million, nine hundred eighty-one thousand, nine hundred two".