3888728645 has 16 divisors (see below), whose sum is σ = 4750583040. Its totient is φ = 3055022400.

The previous prime is 3888728633. The next prime is 3888728647. The reversal of 3888728645 is 5468278883.

3888728645 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3888728645 - 2¹⁸ = 3888466501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3888728647) 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, 294740 + ... + 307650.

It is an arithmetic number, because the mean of its divisors is an integer number (296911440).

Almost surely, 2^3888728645 is an apocalyptic number.

It is an amenable number.

3888728645 is a deficient number, since it is larger than the sum of its proper divisors (861854395).

3888728645 is a wasteful number, since it uses less digits than its factorization.

3888728645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13996.

The product of its digits is 20643840, while the sum is 59.

The square root of 3888728645 is about 62359.6716235742. The cubic root of 3888728645 is about 1572.5430603337.

The spelling of 3888728645 in words is "three billion, eight hundred eighty-eight million, seven hundred twenty-eight thousand, six hundred forty-five".