1978659504 has 60 divisors (see below), whose sum is σ = 5540489136. Its totient is φ = 659197056.

The previous prime is 1978659503. The next prime is 1978659511. The reversal of 1978659504 is 4059568791.

1978659504 is a `hidden beast` number, since 1 + 9 + 7 + 86 + 59 + 504 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1978659503) 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, 510277 + ... + 514139.

Almost surely, 2^1978659504 is an apocalyptic number.

It is an amenable number.

1978659504 is an abundant number, since it is smaller than the sum of its proper divisors (3561829632).

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

1978659504 is a wasteful number, since it uses less digits than its factorization.

1978659504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7434 (or 7425 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The square root of 1978659504 is about 44482.1256686323. The cubic root of 1978659504 is about 1255.4237927924.

The spelling of 1978659504 in words is "one billion, nine hundred seventy-eight million, six hundred fifty-nine thousand, five hundred four".