388505226 has 8 divisors (see below), whose sum is σ = 777010464. Its totient is φ = 129501740.

The previous prime is 388505209. The next prime is 388505231. The reversal of 388505226 is 622505883.

It is a sphenic number, since it is the product of 3 distinct primes.

388505226 is an admirable number.

It is a super-2 number, since 2×388505226² = 301872621258622152, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32375430 + ... + 32375441.

It is an arithmetic number, because the mean of its divisors is an integer number (97126308).

Almost surely, 2^388505226 is an apocalyptic number.

388505226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

388505226 is a wasteful number, since it uses less digits than its factorization.

388505226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64750876.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 388505226 is about 19710.5359135666. The cubic root of 388505226 is about 729.6797406726.

It can be divided in two parts, 3885052 and 26, that added together give a triangular number (3885078 = T₂₇₈₇).

The spelling of 388505226 in words is "three hundred eighty-eight million, five hundred five thousand, two hundred twenty-six".