7987402 has 4 divisors (see below), whose sum is σ = 11981106. Its totient is φ = 3993700.

The previous prime is 7987393. The next prime is 7987403. The reversal of 7987402 is 2047897.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7392961 + 594441 = 2719^2 + 771^2 .

It is not an unprimeable number, because it can be changed into a prime (7987403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996849 + ... + 1996852.

Almost surely, 2^7987402 is an apocalyptic number.

7987402 is a deficient number, since it is larger than the sum of its proper divisors (3993704).

7987402 is a wasteful number, since it uses less digits than its factorization.

7987402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993703.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 7987402 is about 2826.1992144928. The cubic root of 7987402 is about 199.8949615109.

The spelling of 7987402 in words is "seven million, nine hundred eighty-seven thousand, four hundred two".