7872706 has 4 divisors (see below), whose sum is σ = 11809062. Its totient is φ = 3936352.

The previous prime is 7872679. The next prime is 7872731. The reversal of 7872706 is 6072787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6072787 = 7 ⋅867541.

It can be written as a sum of positive squares in only one way, i.e., 6890625 + 982081 = 2625^2 + 991^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1968175 + ... + 1968178.

Almost surely, 2^7872706 is an apocalyptic number.

7872706 is a deficient number, since it is larger than the sum of its proper divisors (3936356).

7872706 is a wasteful number, since it uses less digits than its factorization.

7872706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3936355.

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 7872706 is about 2805.8342787841. The cubic root of 7872706 is about 198.9335400907.

The spelling of 7872706 in words is "seven million, eight hundred seventy-two thousand, seven hundred six".