2455978 has 24 divisors (see below), whose sum is σ = 4514400. Its totient is φ = 996408.

The previous prime is 2455969. The next prime is 2455979. The reversal of 2455978 is 8795542.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a d-powerful number, because it can be written as 2¹⁹ + 4¹⁰ + 5 + 5 + 9⁵ + 7⁷ + 8³ .

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 2455978.

It is not an unprimeable number, because it can be changed into a prime (2455979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1203 + ... + 2521.

It is an arithmetic number, because the mean of its divisors is an integer number (188100).

2^2455978 is an apocalyptic number.

2455978 is a deficient number, since it is larger than the sum of its proper divisors (2058422).

2455978 is a wasteful number, since it uses less digits than its factorization.

2455978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354 (or 1347 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 2455978 is about 1567.1560228643. The cubic root of 2455978 is about 134.9195313775.

The spelling of 2455978 in words is "two million, four hundred fifty-five thousand, nine hundred seventy-eight".