1378564740 has 72 divisors (see below), whose sum is σ = 4779028800. Its totient is φ = 315100224.

The previous prime is 1378564709. The next prime is 1378564751. The reversal of 1378564740 is 474658731.

1378564740 is a `hidden beast` number, since 13 + 7 + 8 + 564 + 74 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 545790 + ... + 548309.

It is an arithmetic number, because the mean of its divisors is an integer number (66375400).

Almost surely, 2^1378564740 is an apocalyptic number.

1378564740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378564740 is an abundant number, since it is smaller than the sum of its proper divisors (3400464060).

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

1378564740 is a wasteful number, since it uses less digits than its factorization.

1378564740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094121 (or 1094116 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 1378564740 is about 37129.0282663040. The cubic root of 1378564740 is about 1112.9501749212.

The spelling of 1378564740 in words is "one billion, three hundred seventy-eight million, five hundred sixty-four thousand, seven hundred forty".