2387978 has 4 divisors (see below), whose sum is σ = 3581970. Its totient is φ = 1193988.

The previous prime is 2387971. The next prime is 2388013. The reversal of 2387978 is 8797832.

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., 2036329 + 351649 = 1427^2 + 593^2 .

It is not an unprimeable number, because it can be changed into a prime (2387971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 596993 + ... + 596996.

2^2387978 is an apocalyptic number.

2387978 is a deficient number, since it is larger than the sum of its proper divisors (1193992).

2387978 is a wasteful number, since it uses less digits than its factorization.

2387978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193991.

The product of its digits is 169344, while the sum is 44.

The square root of 2387978 is about 1545.3083834627. The cubic root of 2387978 is about 133.6626622875.

The spelling of 2387978 in words is "two million, three hundred eighty-seven thousand, nine hundred seventy-eight".