1978480494 has 24 divisors (see below), whose sum is σ = 4299441120. Its totient is φ = 657534528.

The previous prime is 1978480489. The next prime is 1978480573. The reversal of 1978480494 is 4940848791.

1978480494 is a `hidden beast` number, since 1 + 9 + 78 + 4 + 80 + 494 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1978480494.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157014 + ... + 169145.

It is an arithmetic number, because the mean of its divisors is an integer number (179143380).

Almost surely, 2^1978480494 is an apocalyptic number.

1978480494 is an abundant number, since it is smaller than the sum of its proper divisors (2320960626).

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

1978480494 is a wasteful number, since it uses less digits than its factorization.

1978480494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326504 (or 326501 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The square root of 1978480494 is about 44480.1134665819. The cubic root of 1978480494 is about 1255.3859321111.

The spelling of 1978480494 in words is "one billion, nine hundred seventy-eight million, four hundred eighty thousand, four hundred ninety-four".