388364842 has 4 divisors (see below), whose sum is σ = 582547266. Its totient is φ = 194182420.

The previous prime is 388364819. The next prime is 388364843. The reversal of 388364842 is 248463883.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 381069441 + 7295401 = 19521^2 + 2701^2 .

It is a junction number, because it is equal to n+sod(n) for n = 388364792 and 388364801.

It is not an unprimeable number, because it can be changed into a prime (388364843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97091209 + ... + 97091212.

Almost surely, 2^388364842 is an apocalyptic number.

388364842 is a deficient number, since it is larger than the sum of its proper divisors (194182424).

388364842 is a wasteful number, since it uses less digits than its factorization.

388364842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194182423.

The product of its digits is 884736, while the sum is 46.

The square root of 388364842 is about 19706.9744506862. The cubic root of 388364842 is about 729.5918416393.

The spelling of 388364842 in words is "three hundred eighty-eight million, three hundred sixty-four thousand, eight hundred forty-two".