744771378 has 32 divisors (see below), whose sum is σ = 1605240000. Its totient is φ = 229000896.

The previous prime is 744771371. The next prime is 744771421. The reversal of 744771378 is 873177447.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (744771371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161448 + ... + 165996.

It is an arithmetic number, because the mean of its divisors is an integer number (50163750).

Almost surely, 2^744771378 is an apocalyptic number.

744771378 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

744771378 is an abundant number, since it is smaller than the sum of its proper divisors (860468622).

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

744771378 is a wasteful number, since it uses less digits than its factorization.

744771378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6666.

The product of its digits is 921984, while the sum is 48.

The square root of 744771378 is about 27290.4997755629. The cubic root of 744771378 is about 906.4440294309. Note that the first 3 decimals are identical.

It can be divided in two parts, 74477 and 1378, that added together give a triangular number (75855 = T₃₈₉).

The spelling of 744771378 in words is "seven hundred forty-four million, seven hundred seventy-one thousand, three hundred seventy-eight".