8078440 has 16 divisors (see below), whose sum is σ = 18176580. Its totient is φ = 3231360.

The previous prime is 8078437. The next prime is 8078459. The reversal of 8078440 is 448708.

It can be written as a sum of positive squares in 2 ways, for example, as 7279204 + 799236 = 2698^2 + 894^2 .

It is a super-2 number, since 2×8078440² = 130522385667200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100941 + ... + 101020.

Almost surely, 2^8078440 is an apocalyptic number.

It is an amenable number.

8078440 is an abundant number, since it is smaller than the sum of its proper divisors (10098140).

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

8078440 is a wasteful number, since it uses less digits than its factorization.

8078440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201972 (or 201968 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 8078440 is about 2842.2596644220. The cubic root of 8078440 is about 200.6515418280.

The spelling of 8078440 in words is "eight million, seventy-eight thousand, four hundred forty".