6372778 has 4 divisors (see below), whose sum is σ = 9559170. Its totient is φ = 3186388.

The previous prime is 6372749. The next prime is 6372781. The reversal of 6372778 is 8772736.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6115729 + 257049 = 2473^2 + 507^2 .

It is a super-2 number, since 2×6372778² = 81224598874568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 6⁵ + 3¹⁰ + 7² + 2¹⁹ + 7⁵ + 7⁸ + 8 .

It is a self number, because there is not a number n which added to its sum of digits gives 6372778.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1593193 + ... + 1593196.

Almost surely, 2^6372778 is an apocalyptic number.

6372778 is a deficient number, since it is larger than the sum of its proper divisors (3186392).

6372778 is a wasteful number, since it uses less digits than its factorization.

6372778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3186391.

The product of its digits is 98784, while the sum is 40.

The square root of 6372778 is about 2524.4361746735. The cubic root of 6372778 is about 185.3999431339.

The spelling of 6372778 in words is "six million, three hundred seventy-two thousand, seven hundred seventy-eight".