1978269248 has 14 divisors (see below), whose sum is σ = 3925628166. Its totient is φ = 989134592.

The previous prime is 1978269239. The next prime is 1978269253. The reversal of 1978269248 is 8429628791.

It can be written as a sum of positive squares in only one way, i.e., 1663987264 + 314281984 = 40792^2 + 17728^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1978269193 and 1978269202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15455165 + ... + 15455292.

Almost surely, 2^1978269248 is an apocalyptic number.

It is an amenable number.

1978269248 is a deficient number, since it is larger than the sum of its proper divisors (1947358918).

1978269248 is an equidigital number, since it uses as much as digits as its factorization.

1978269248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30910469 (or 30910459 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 56.

The square root of 1978269248 is about 44477.7387914449. The cubic root of 1978269248 is about 1255.3412505661.

The spelling of 1978269248 in words is "one billion, nine hundred seventy-eight million, two hundred sixty-nine thousand, two hundred forty-eight".