3928478744 has 8 divisors (see below), whose sum is σ = 7365897660. Its totient is φ = 1964239368.

The previous prime is 3928478669. The next prime is 3928478783. The reversal of 3928478744 is 4478748293.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 3928478744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245529914 + ... + 245529929.

Almost surely, 2^3928478744 is an apocalyptic number.

It is an amenable number.

3928478744 is a deficient number, since it is larger than the sum of its proper divisors (3437418916).

3928478744 is a wasteful number, since it uses less digits than its factorization.

3928478744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491059849 (or 491059845 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 56.

The square root of 3928478744 is about 62677.5776813367. The cubic root of 3928478744 is about 1577.8830196384.

The spelling of 3928478744 in words is "three billion, nine hundred twenty-eight million, four hundred seventy-eight thousand, seven hundred forty-four".