1378679280 has 80 divisors (see below), whose sum is σ = 4662451584. Its totient is φ = 334224640.

The previous prime is 1378679261. The next prime is 1378679299. The reversal of 1378679280 is 829768731.

It is an interprime number because it is at equal distance from previous prime (1378679261) and next prime (1378679299).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258474 + ... + 263753.

Almost surely, 2^1378679280 is an apocalyptic number.

1378679280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378679280 is an abundant number, since it is smaller than the sum of its proper divisors (3283772304).

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

1378679280 is a wasteful number, since it uses less digits than its factorization.

1378679280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522254 (or 522248 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 1378679280 is about 37130.5706931633. The cubic root of 1378679280 is about 1112.9809977470.

The spelling of 1378679280 in words is "one billion, three hundred seventy-eight million, six hundred seventy-nine thousand, two hundred eighty".