6400088 has 8 divisors (see below), whose sum is σ = 12000180. Its totient is φ = 3200040.

The previous prime is 6400033. The next prime is 6400091. The reversal of 6400088 is 8800046.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×6400088² = 81922252815488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399998 + ... + 400013.

Almost surely, 2^6400088 is an apocalyptic number.

It is an amenable number.

6400088 is a deficient number, since it is larger than the sum of its proper divisors (5600092).

6400088 is a wasteful number, since it uses less digits than its factorization.

6400088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800017 (or 800013 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 6400088 is about 2529.8395206020. The cubic root of 6400088 is about 185.6644042986.

The spelling of 6400088 in words is "six million, four hundred thousand, eighty-eight".