7882978 has 8 divisors (see below), whose sum is σ = 11986668. Its totient is φ = 3887424.

The previous prime is 7882957. The next prime is 7882991. The reversal of 7882978 is 8792887.

It can be written as a sum of positive squares in 2 ways, for example, as 6848689 + 1034289 = 2617^2 + 1017^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26851 + ... + 27142.

Almost surely, 2^7882978 is an apocalyptic number.

7882978 is a deficient number, since it is larger than the sum of its proper divisors (4103690).

7882978 is a wasteful number, since it uses less digits than its factorization.

7882978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54068.

The product of its digits is 451584, while the sum is 49.

The square root of 7882978 is about 2807.6641537050. The cubic root of 7882978 is about 199.0200227322.

Subtracting 7882978 from its reverse (8792887), we obtain a palindrome (909909).

The spelling of 7882978 in words is "seven million, eight hundred eighty-two thousand, nine hundred seventy-eight".