2361978 has 12 divisors (see below), whose sum is σ = 5117658. Its totient is φ = 787320.

The previous prime is 2361977. The next prime is 2361991. The reversal of 2361978 is 8791632.

It can be written as a sum of positive squares in only one way, i.e., 1375929 + 986049 = 1173^2 + 993^2 .

It is not an unprimeable number, because it can be changed into a prime (2361977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65593 + ... + 65628.

2^2361978 is an apocalyptic number.

2361978 is an abundant number, since it is smaller than the sum of its proper divisors (2755680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2361978 is a wasteful number, since it uses less digits than its factorization.

2361978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131229 (or 131226 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 2361978 is about 1536.8727989004. The cubic root of 2361978 is about 133.1757903137.

It can be divided in two parts, 23 and 61978, that added together give a square (62001 = 249²).

The spelling of 2361978 in words is "two million, three hundred sixty-one thousand, nine hundred seventy-eight".