1278379488 has 48 divisors (see below), whose sum is σ = 3464004096. Its totient is φ = 412379520.

The previous prime is 1278379483. The next prime is 1278379493. The reversal of 1278379488 is 8849738721.

It is an interprime number because it is at equal distance from previous prime (1278379483) and next prime (1278379493).

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278379483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211806 + ... + 217757.

It is an arithmetic number, because the mean of its divisors is an integer number (72166752).

Almost surely, 2^1278379488 is an apocalyptic number.

It is an amenable number.

1278379488 is an abundant number, since it is smaller than the sum of its proper divisors (2185624608).

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

1278379488 is a wasteful number, since it uses less digits than its factorization.

1278379488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429607 (or 429599 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 57.

The square root of 1278379488 is about 35754.4331237401. The cubic root of 1278379488 is about 1085.3086503947.

The spelling of 1278379488 in words is "one billion, two hundred seventy-eight million, three hundred seventy-nine thousand, four hundred eighty-eight".