7621042878 has 24 divisors (see below), whose sum is σ = 17081649000. Its totient is φ = 2452749264.

The previous prime is 7621042867. The next prime is 7621042901. The reversal of 7621042878 is 8782401267.

7621042878 is a `hidden beast` number, since 7 + 6 + 210 + 428 + 7 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7299328 + ... + 7300371.

It is an arithmetic number, because the mean of its divisors is an integer number (711735375).

Almost surely, 2^7621042878 is an apocalyptic number.

7621042878 is an abundant number, since it is smaller than the sum of its proper divisors (9460606122).

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

7621042878 is a wasteful number, since it uses less digits than its factorization.

7621042878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14599736 (or 14599733 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 7621042878 is about 87298.5846277017. The cubic root of 7621042878 is about 1967.9080473966.

The spelling of 7621042878 in words is "seven billion, six hundred twenty-one million, forty-two thousand, eight hundred seventy-eight".