1378164720 has 160 divisors (see below), whose sum is σ = 4351007232. Its totient is φ = 360815616.

The previous prime is 1378164713. The next prime is 1378164731. The reversal of 1378164720 is 274618731.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4869699 + ... + 4869981.

Almost surely, 2^1378164720 is an apocalyptic number.

1378164720 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 1378164720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2175503616).

1378164720 is an abundant number, since it is smaller than the sum of its proper divisors (2972842512).

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

1378164720 is a wasteful number, since it uses less digits than its factorization.

1378164720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 1378164720 is about 37123.6409852267. The cubic root of 1378164720 is about 1112.8425157535.

The spelling of 1378164720 in words is "one billion, three hundred seventy-eight million, one hundred sixty-four thousand, seven hundred twenty".