1978854292 has 6 divisors (see below), whose sum is σ = 3462995018. Its totient is φ = 989427144.

The previous prime is 1978854287. The next prime is 1978854347. The reversal of 1978854292 is 2924588791.

It can be written as a sum of positive squares in only one way, i.e., 1089264016 + 889590276 = 33004^2 + 29826^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247356783 + ... + 247356790.

Almost surely, 2^1978854292 is an apocalyptic number.

It is an amenable number.

1978854292 is a deficient number, since it is larger than the sum of its proper divisors (1484140726).

1978854292 is a wasteful number, since it uses less digits than its factorization.

1978854292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494713577 (or 494713575 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 55.

The square root of 1978854292 is about 44484.3151234230. The cubic root of 1978854292 is about 1255.4649879324.

The spelling of 1978854292 in words is "one billion, nine hundred seventy-eight million, eight hundred fifty-four thousand, two hundred ninety-two".