388780423 has 4 divisors (see below), whose sum is σ = 399288040. Its totient is φ = 378272808.

The previous prime is 388780421. The next prime is 388780439. The reversal of 388780423 is 324087883.

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

It is a cyclic number.

It is not a de Polignac number, because 388780423 - 2¹ = 388780421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 388780423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388780421) 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, 5253753 + ... + 5253826.

It is an arithmetic number, because the mean of its divisors is an integer number (99822010).

Almost surely, 2^388780423 is an apocalyptic number.

388780423 is a deficient number, since it is larger than the sum of its proper divisors (10507617).

388780423 is a wasteful number, since it uses less digits than its factorization.

388780423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10507616.

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 388780423 is about 19717.5156396540. The cubic root of 388780423 is about 729.8519891327.

The spelling of 388780423 in words is "three hundred eighty-eight million, seven hundred eighty thousand, four hundred twenty-three".