2390978 has 4 divisors (see below), whose sum is σ = 3586470. Its totient is φ = 1195488.

The previous prime is 2390957. The next prime is 2390987. The reversal of 2390978 is 8790932.

2390978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 1315609 + 1075369 = 1147^2 + 1037^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597743 + ... + 597746.

2^2390978 is an apocalyptic number.

2390978 is a deficient number, since it is larger than the sum of its proper divisors (1195492).

2390978 is a wasteful number, since it uses less digits than its factorization.

2390978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195491.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 2390978 is about 1546.2787588271. The cubic root of 2390978 is about 133.7186120191.

The spelling of 2390978 in words is "two million, three hundred ninety thousand, nine hundred seventy-eight".