388829421 has 12 divisors (see below), whose sum is σ = 586062048. Its totient is φ = 247949064.

The previous prime is 388829401. The next prime is 388829431. The reversal of 388829421 is 124928883.

It is not a de Polignac number, because 388829421 - 2²⁶ = 321720557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388829401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 938995 + ... + 939408.

It is an arithmetic number, because the mean of its divisors is an integer number (48838504).

Almost surely, 2^388829421 is an apocalyptic number.

It is an amenable number.

388829421 is a deficient number, since it is larger than the sum of its proper divisors (197232627).

388829421 is a wasteful number, since it uses less digits than its factorization.

388829421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878432 (or 1878429 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 388829421 is about 19718.7580998399. The cubic root of 388829421 is about 729.8826489288.

The spelling of 388829421 in words is "three hundred eighty-eight million, eight hundred twenty-nine thousand, four hundred twenty-one".