6820378 has 4 divisors (see below), whose sum is σ = 10230570. Its totient is φ = 3410188.

The previous prime is 6820369. The next prime is 6820393. The reversal of 6820378 is 8730286.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8730286 = 2 ⋅4365143.

It can be written as a sum of positive squares in only one way, i.e., 6185169 + 635209 = 2487^2 + 797^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1705093 + ... + 1705096.

Almost surely, 2^6820378 is an apocalyptic number.

6820378 is a deficient number, since it is larger than the sum of its proper divisors (3410192).

6820378 is a wasteful number, since it uses less digits than its factorization.

6820378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410191.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 6820378 is about 2611.5853422778. The cubic root of 6820378 is about 189.6427080407.

The spelling of 6820378 in words is "six million, eight hundred twenty thousand, three hundred seventy-eight".