388997532 has 192 divisors, whose sum is σ = 1301529600. Its totient is φ = 97493760.

The previous prime is 388997527. The next prime is 388997591. The reversal of 388997532 is 235799883.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 240358 + ... + 241970.

It is an arithmetic number, because the mean of its divisors is an integer number (6778800).

Almost surely, 2^388997532 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 388997532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (650764800).

388997532 is an abundant number, since it is smaller than the sum of its proper divisors (912532068).

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

388997532 is a wasteful number, since it uses less digits than its factorization.

388997532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673 (or 1665 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 388997532 is about 19723.0203569332. The cubic root of 388997532 is about 729.9878224027.

The spelling of 388997532 in words is "three hundred eighty-eight million, nine hundred ninety-seven thousand, five hundred thirty-two".