388742536 has 128 divisors (see below), whose sum is σ = 962357760. Its totient is φ = 142848000.

The previous prime is 388742533. The next prime is 388742561. The reversal of 388742536 is 635247883.

It is a super-2 number, since 2×388742536² = 302241518591422592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388742531) 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, 1249821 + ... + 1250131.

It is an arithmetic number, because the mean of its divisors is an integer number (7518420).

Almost surely, 2^388742536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388742536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (481178880).

388742536 is an abundant number, since it is smaller than the sum of its proper divisors (573615224).

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

388742536 is a wasteful number, since it uses less digits than its factorization.

388742536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 451 counting only the distinct ones).

The product of its digits is 967680, while the sum is 46.

The square root of 388742536 is about 19716.5548714779. The cubic root of 388742536 is about 729.8282801194.

The spelling of 388742536 in words is "three hundred eighty-eight million, seven hundred forty-two thousand, five hundred thirty-six".