388495440 has 200 divisors, whose sum is σ = 1361162880. Its totient is φ = 102691584.

The previous prime is 388495433. The next prime is 388495453. The reversal of 388495440 is 44594883.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1081981 + ... + 1082339.

Almost surely, 2^388495440 is an apocalyptic number.

388495440 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 388495440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (680581440).

388495440 is an abundant number, since it is smaller than the sum of its proper divisors (972667440).

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

388495440 is a wasteful number, since it uses less digits than its factorization.

388495440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 388495440 is about 19710.2876691336. The cubic root of 388495440 is about 729.6736140232.

The spelling of 388495440 in words is "three hundred eighty-eight million, four hundred ninety-five thousand, four hundred forty".