6978426 has 32 divisors (see below), whose sum is σ = 17179008. Its totient is φ = 1840320.

The previous prime is 6978421. The next prime is 6978431. The reversal of 6978426 is 6248796.

It is an interprime number because it is at equal distance from previous prime (6978421) and next prime (6978431).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6978421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5845 + ... + 6936.

It is an arithmetic number, because the mean of its divisors is an integer number (536844).

Almost surely, 2^6978426 is an apocalyptic number.

6978426 is an abundant number, since it is smaller than the sum of its proper divisors (10200582).

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

6978426 is a wasteful number, since it uses less digits than its factorization.

6978426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12806.

The product of its digits is 145152, while the sum is 42.

The square root of 6978426 is about 2641.6710620363. The cubic root of 6978426 is about 191.0963942406.

The spelling of 6978426 in words is "six million, nine hundred seventy-eight thousand, four hundred twenty-six".