1978448092 has 48 divisors (see below), whose sum is σ = 3680127360. Its totient is φ = 929218752.

The previous prime is 1978448081. The next prime is 1978448107. The reversal of 1978448092 is 2908448791.

It is a happy number.

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 in 15 ways as a sum of consecutive naturals, for example, 643543 + ... + 646609.

It is an arithmetic number, because the mean of its divisors is an integer number (76669320).

Almost surely, 2^1978448092 is an apocalyptic number.

It is an amenable number.

1978448092 is a deficient number, since it is larger than the sum of its proper divisors (1701679268).

1978448092 is a wasteful number, since it uses less digits than its factorization.

1978448092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3250 (or 3248 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 52.

The square root of 1978448092 is about 44479.7492349046. The cubic root of 1978448092 is about 1255.3790788320.

It can be divided in two parts, 19784 and 48092, that added together give a palindrome (67876).

The spelling of 1978448092 in words is "one billion, nine hundred seventy-eight million, four hundred forty-eight thousand, ninety-two".