1378963278 has 224 divisors, whose sum is σ = 3943613952. Its totient is φ = 351086400.

The previous prime is 1378963277. The next prime is 1378963283. The reversal of 1378963278 is 8723698731.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378963277) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 7970800 + ... + 7970972.

Almost surely, 2^1378963278 is an apocalyptic number.

1378963278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378963278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1971806976).

1378963278 is an abundant number, since it is smaller than the sum of its proper divisors (2564650674).

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

1378963278 is a wasteful number, since it uses less digits than its factorization.

1378963278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 267 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 1378963278 is about 37134.3948112797. The cubic root of 1378963278 is about 1113.0574145228.

The spelling of 1378963278 in words is "one billion, three hundred seventy-eight million, nine hundred sixty-three thousand, two hundred seventy-eight".