388764025040 has 20 divisors (see below), whose sum is σ = 903876358404. Its totient is φ = 155505609984.

The previous prime is 388764024983. The next prime is 388764025043. The reversal of 388764025040 is 40520467883.

It can be written as a sum of positive squares in 2 ways, for example, as 77297344576 + 311466680464 = 278024^2 + 558092^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×388764025040² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388764025043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2429775077 + ... + 2429775236.

Almost surely, 2^388764025040 is an apocalyptic number.

It is an amenable number.

388764025040 is an abundant number, since it is smaller than the sum of its proper divisors (515112333364).

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

388764025040 is a wasteful number, since it uses less digits than its factorization.

388764025040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4859550326 (or 4859550320 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 388764025040 in words is "three hundred eighty-eight billion, seven hundred sixty-four million, twenty-five thousand, forty".