1878453978 has 16 divisors (see below), whose sum is σ = 3757422816. Its totient is φ = 626065520.

The previous prime is 1878453971. The next prime is 1878453979. The reversal of 1878453978 is 8793548781.

It is not an unprimeable number, because it can be changed into a prime (1878453971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39148 + ... + 72728.

It is an arithmetic number, because the mean of its divisors is an integer number (234838926).

Almost surely, 2^1878453978 is an apocalyptic number.

1878453978 is an abundant number, since it is smaller than the sum of its proper divisors (1878968838).

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

1878453978 is a wasteful number, since it uses less digits than its factorization.

1878453978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42909.

The product of its digits is 13547520, while the sum is 60.

The square root of 1878453978 is about 43341.1349413003. The cubic root of 1878453978 is about 1233.8627497918.

The spelling of 1878453978 in words is "one billion, eight hundred seventy-eight million, four hundred fifty-three thousand, nine hundred seventy-eight".