388816494 has 48 divisors (see below), whose sum is σ = 895380480. Its totient is φ = 111615120.

The previous prime is 388816487. The next prime is 388816507. The reversal of 388816494 is 494618883.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15667 + ... + 31985.

It is an arithmetic number, because the mean of its divisors is an integer number (18653760).

Almost surely, 2^388816494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388816494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (447690240).

388816494 is an abundant number, since it is smaller than the sum of its proper divisors (506563986).

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

388816494 is a wasteful number, since it uses less digits than its factorization.

388816494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16373 (or 16354 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 51.

The square root of 388816494 is about 19718.4303127810. The cubic root of 388816494 is about 729.8745602940.

The spelling of 388816494 in words is "three hundred eighty-eight million, eight hundred sixteen thousand, four hundred ninety-four".