388830780 has 240 divisors, whose sum is σ = 1351812000. Its totient is φ = 92938752.

The previous prime is 388830769. The next prime is 388830787. The reversal of 388830780 is 87038883.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388830787) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 778971 + ... + 779469.

It is an arithmetic number, because the mean of its divisors is an integer number (5632550).

Almost surely, 2^388830780 is an apocalyptic number.

388830780 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 388830780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (675906000).

388830780 is an abundant number, since it is smaller than the sum of its proper divisors (962981220).

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

388830780 is a wasteful number, since it uses less digits than its factorization.

388830780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 388830780 is about 19718.7925593835. The cubic root of 388830780 is about 729.8834992669.

The spelling of 388830780 in words is "three hundred eighty-eight million, eight hundred thirty thousand, seven hundred eighty".