388923077 has 4 divisors (see below), whose sum is σ = 405832800. Its totient is φ = 372013356.

The previous prime is 388923071. The next prime is 388923079. The reversal of 388923077 is 770329883.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 770329883 = 5407 ⋅142469.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388923077 is a prime.

It is a super-2 number, since 2×388923077² = 302522319646295858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388923071) 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, 8454827 + ... + 8454872.

It is an arithmetic number, because the mean of its divisors is an integer number (101458200).

Almost surely, 2^388923077 is an apocalyptic number.

It is an amenable number.

388923077 is a deficient number, since it is larger than the sum of its proper divisors (16909723).

388923077 is a wasteful number, since it uses less digits than its factorization.

388923077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16909722.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 388923077 is about 19721.1327514420. The cubic root of 388923077 is about 729.9412456622.

The spelling of 388923077 in words is "three hundred eighty-eight million, nine hundred twenty-three thousand, seventy-seven".