388289280 has 72 divisors (see below), whose sum is σ = 1240111152. Its totient is φ = 103542784.

The previous prime is 388289267. The next prime is 388289281. The reversal of 388289280 is 82982883.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (388289281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46719 + ... + 54398.

It is an arithmetic number, because the mean of its divisors is an integer number (17223766).

Almost surely, 2^388289280 is an apocalyptic number.

388289280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

388289280 is an abundant number, since it is smaller than the sum of its proper divisors (851821872).

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

388289280 is a wasteful number, since it uses less digits than its factorization.

388289280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101141 (or 101127 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The square root of 388289280 is about 19705.0572188969. The cubic root of 388289280 is about 729.5445210200.

The spelling of 388289280 in words is "three hundred eighty-eight million, two hundred eighty-nine thousand, two hundred eighty".