388434842 has 4 divisors (see below), whose sum is σ = 582652266. Its totient is φ = 194217420.

The previous prime is 388434817. The next prime is 388434857. The reversal of 388434842 is 248434883.

It is a happy number.

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., 381459961 + 6974881 = 19531^2 + 2641^2 .

It is a junction number, because it is equal to n+sod(n) for n = 388434793 and 388434802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97108709 + ... + 97108712.

Almost surely, 2^388434842 is an apocalyptic number.

388434842 is a deficient number, since it is larger than the sum of its proper divisors (194217424).

388434842 is a wasteful number, since it uses less digits than its factorization.

388434842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194217423.

The product of its digits is 589824, while the sum is 44.

The square root of 388434842 is about 19708.7503916408. The cubic root of 388434842 is about 729.6356735857.

The spelling of 388434842 in words is "three hundred eighty-eight million, four hundred thirty-four thousand, eight hundred forty-two".