1378553280 has 336 divisors, whose sum is σ = 4919654880. Its totient is φ = 326516736.

The previous prime is 1378553269. The next prime is 1378553317. The reversal of 1378553280 is 823558731.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4704814 + ... + 4705106.

It is an arithmetic number, because the mean of its divisors is an integer number (14641830).

Almost surely, 2^1378553280 is an apocalyptic number.

1378553280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378553280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2459827440).

1378553280 is an abundant number, since it is smaller than the sum of its proper divisors (3541101600).

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

1378553280 is a wasteful number, since it uses less digits than its factorization.

1378553280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 1378553280 is about 37128.8739392942. The cubic root of 1378553280 is about 1112.9470909301.

The spelling of 1378553280 in words is "one billion, three hundred seventy-eight million, five hundred fifty-three thousand, two hundred eighty".