7701238638 has 12 divisors (see below), whose sum is σ = 16686017088. Its totient is φ = 2567079540.

The previous prime is 7701238609. The next prime is 7701238673. The reversal of 7701238638 is 8368321077.

7701238638 is a `hidden beast` number, since 7 + 7 + 0 + 1 + 2 + 3 + 8 + 638 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 7701238593 and 7701238602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 213923278 + ... + 213923313.

It is an arithmetic number, because the mean of its divisors is an integer number (1390501424).

Almost surely, 2^7701238638 is an apocalyptic number.

7701238638 is an abundant number, since it is smaller than the sum of its proper divisors (8984778450).

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

7701238638 is a wasteful number, since it uses less digits than its factorization.

7701238638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427846599 (or 427846596 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 7701238638 is about 87756.7013851364. The cubic root of 7701238638 is about 1974.7867002887.

The spelling of 7701238638 in words is "seven billion, seven hundred one million, two hundred thirty-eight thousand, six hundred thirty-eight".