7478878 has 16 divisors (see below), whose sum is σ = 12958704. Its totient is φ = 3199360.

The previous prime is 7478873. The next prime is 7478893. The reversal of 7478878 is 8788747.

It is a super-2 number, since 2×7478878² = 111867232277768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7478873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9625 + ... + 10372.

It is an arithmetic number, because the mean of its divisors is an integer number (809919).

Almost surely, 2^7478878 is an apocalyptic number.

7478878 is a deficient number, since it is larger than the sum of its proper divisors (5479826).

7478878 is a wasteful number, since it uses less digits than its factorization.

7478878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20027.

The product of its digits is 702464, while the sum is 49.

The square root of 7478878 is about 2734.7537366279. The cubic root of 7478878 is about 195.5594540995.

The spelling of 7478878 in words is "seven million, four hundred seventy-eight thousand, eight hundred seventy-eight".