388732745457 has 40 divisors (see below), whose sum is σ = 663730496000. Its totient is φ = 222108267456.

The previous prime is 388732745449. The next prime is 388732745509. The reversal of 388732745457 is 754547237883.

It is a happy number.

388732745457 is a `hidden beast` number, since 3 + 8 + 87 + 3 + 2 + 7 + 4 + 545 + 7 = 666.

It is not a de Polignac number, because 388732745457 - 2³ = 388732745449 is a prime.

It is a super-2 number, since 2×388732745457² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 388732745394 and 388732745403.

It is not an unprimeable number, because it can be changed into a prime (388732745407) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5863269 + ... + 5929197.

It is an arithmetic number, because the mean of its divisors is an integer number (16593262400).

Almost surely, 2^388732745457 is an apocalyptic number.

It is an amenable number.

388732745457 is a deficient number, since it is larger than the sum of its proper divisors (274997750543).

388732745457 is a wasteful number, since it uses less digits than its factorization.

388732745457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76347 (or 76338 counting only the distinct ones).

The product of its digits is 158054400, while the sum is 63.

The spelling of 388732745457 in words is "three hundred eighty-eight billion, seven hundred thirty-two million, seven hundred forty-five thousand, four hundred fifty-seven".