4000388 has 12 divisors (see below), whose sum is σ = 8000832. Its totient is φ = 1714440.

The previous prime is 4000379. The next prime is 4000439. The reversal of 4000388 is 8830004.

4000388 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71408 + ... + 71463.

It is an arithmetic number, because the mean of its divisors is an integer number (666736).

Almost surely, 2^4000388 is an apocalyptic number.

It is an amenable number.

4000388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

4000388 is a wasteful number, since it uses less digits than its factorization.

4000388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142882 (or 142880 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 4000388 is about 2000.0969976479. The cubic root of 4000388 is about 158.7452376276.

The spelling of 4000388 in words is "four million, three hundred eighty-eight", and thus it is an aban number.