388740446 has 8 divisors (see below), whose sum is σ = 583935240. Its totient is φ = 194095368.

The previous prime is 388740433. The next prime is 388740449. The reversal of 388740446 is 644047883.

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

It is a super-2 number, since 2×388740446² = 302238268712557832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 388740397 and 388740406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388740449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135656 + ... + 138491.

It is an arithmetic number, because the mean of its divisors is an integer number (72991905).

Almost surely, 2^388740446 is an apocalyptic number.

388740446 is a deficient number, since it is larger than the sum of its proper divisors (195194794).

388740446 is a wasteful number, since it uses less digits than its factorization.

388740446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274858.

The product of its (nonzero) digits is 516096, while the sum is 44.

The square root of 388740446 is about 19716.5018702609. The cubic root of 388740446 is about 729.8269721897.

The spelling of 388740446 in words is "three hundred eighty-eight million, seven hundred forty thousand, four hundred forty-six".