7888138550 has 24 divisors (see below), whose sum is σ = 15534994536. Its totient is φ = 2969651840.

The previous prime is 7888138549. The next prime is 7888138561. The reversal of 7888138550 is 558318887.

It is a happy number.

It is a super-2 number, since 2×7888138550² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7888138492 and 7888138501.

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, 4639232 + ... + 4640931.

It is an arithmetic number, because the mean of its divisors is an integer number (647291439).

Almost surely, 2^7888138550 is an apocalyptic number.

7888138550 is a deficient number, since it is larger than the sum of its proper divisors (7646855986).

7888138550 is a wasteful number, since it uses less digits than its factorization.

7888138550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9280192 (or 9280187 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 53.

The square root of 7888138550 is about 88815.1932385445. The cubic root of 7888138550 is about 1990.6344239503.

The spelling of 7888138550 in words is "seven billion, eight hundred eighty-eight million, one hundred thirty-eight thousand, five hundred fifty".