6426388 has 6 divisors (see below), whose sum is σ = 11246186. Its totient is φ = 3213192.

The previous prime is 6426383. The next prime is 6426397. The reversal of 6426388 is 8836246.

It can be written as a sum of positive squares in only one way, i.e., 4318084 + 2108304 = 2078^2 + 1452^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6426383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803295 + ... + 803302.

Almost surely, 2^6426388 is an apocalyptic number.

It is an amenable number.

6426388 is a deficient number, since it is larger than the sum of its proper divisors (4819798).

6426388 is a wasteful number, since it uses less digits than its factorization.

6426388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606601 (or 1606599 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 6426388 is about 2535.0321496975. The cubic root of 6426388 is about 185.9183747906.

The spelling of 6426388 in words is "six million, four hundred twenty-six thousand, three hundred eighty-eight".