744921387 has 32 divisors (see below), whose sum is σ = 1262566400. Its totient is φ = 425222784.

The previous prime is 744921383. The next prime is 744921409. The reversal of 744921387 is 783129447.

744921387 is a `hidden beast` number, since 74 + 492 + 13 + 87 = 666.

744921387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 744921387 - 2² = 744921383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (744921383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 280098 + ... + 282744.

It is an arithmetic number, because the mean of its divisors is an integer number (39455200).

Almost surely, 2^744921387 is an apocalyptic number.

744921387 is a deficient number, since it is larger than the sum of its proper divisors (517645013).

744921387 is a wasteful number, since it uses less digits than its factorization.

744921387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4152 (or 4146 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 744921387 is about 27293.2480111840. The cubic root of 744921387 is about 906.5048828410.

The spelling of 744921387 in words is "seven hundred forty-four million, nine hundred twenty-one thousand, three hundred eighty-seven".