388031040 has 224 divisors, whose sum is σ = 1385986560. Its totient is φ = 102187008.

The previous prime is 388031029. The next prime is 388031047. The reversal of 388031040 is 40130883.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 388030995 and 388031013.

It is not an unprimeable number, because it can be changed into a prime (388031047) 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, 837849 + ... + 838311.

It is an arithmetic number, because the mean of its divisors is an integer number (6187440).

Almost surely, 2^388031040 is an apocalyptic number.

388031040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388031040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (692993280).

388031040 is an abundant number, since it is smaller than the sum of its proper divisors (997955520).

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

388031040 is a wasteful number, since it uses less digits than its factorization.

388031040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 388031040 is about 19698.5034964588. The cubic root of 388031040 is about 729.3827521463.

The spelling of 388031040 in words is "three hundred eighty-eight million, thirty-one thousand, forty".