388143340 has 24 divisors (see below), whose sum is σ = 877801680. Its totient is φ = 143314368.

The previous prime is 388143323. The next prime is 388143341. The reversal of 388143340 is 43341883.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 388143296 and 388143305.

It is not an unprimeable number, because it can be changed into a prime (388143341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 746170 + ... + 746689.

It is an arithmetic number, because the mean of its divisors is an integer number (36575070).

Almost surely, 2^388143340 is an apocalyptic number.

It is an amenable number.

388143340 is an abundant number, since it is smaller than the sum of its proper divisors (489658340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

388143340 is a wasteful number, since it uses less digits than its factorization.

388143340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492881 (or 1492879 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 388143340 is about 19701.3537605922. The cubic root of 388143340 is about 729.4531088739.

The spelling of 388143340 in words is "three hundred eighty-eight million, one hundred forty-three thousand, three hundred forty".