2401978 has 4 divisors (see below), whose sum is σ = 3602970. Its totient is φ = 1200988.

The previous prime is 2401969. The next prime is 2401991. The reversal of 2401978 is 8791042.

2401978 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., 1734489 + 667489 = 1317^2 + 817^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 600493 + ... + 600496.

2^2401978 is an apocalyptic number.

2401978 is a deficient number, since it is larger than the sum of its proper divisors (1200992).

2401978 is a wasteful number, since it uses less digits than its factorization.

2401978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200991.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 2401978 is about 1549.8316037557. The cubic root of 2401978 is about 133.9233615379.

The spelling of 2401978 in words is "two million, four hundred one thousand, nine hundred seventy-eight".