2321978 has 4 divisors (see below), whose sum is σ = 3482970. Its totient is φ = 1160988.

The previous prime is 2321959. The next prime is 2321981. The reversal of 2321978 is 8791232.

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., 1481089 + 840889 = 1217^2 + 917^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580493 + ... + 580496.

2^2321978 is an apocalyptic number.

2321978 is a deficient number, since it is larger than the sum of its proper divisors (1160992).

2321978 is a wasteful number, since it uses less digits than its factorization.

2321978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160991.

The product of its digits is 6048, while the sum is 32.

The square root of 2321978 is about 1523.8037931440. The cubic root of 2321978 is about 132.4197306630.

The spelling of 2321978 in words is "two million, three hundred twenty-one thousand, nine hundred seventy-eight".