7270705638 has 40 divisors (see below), whose sum is σ = 18619164432. Its totient is φ = 2077344144.

The previous prime is 7270705633. The next prime is 7270705643. The reversal of 7270705638 is 8365070727.

7270705638 is a `hidden beast` number, since 7 + 2 + 7 + 0 + 7 + 0 + 5 + 638 = 666.

It is an interprime number because it is at equal distance from previous prime (7270705633) and next prime (7270705643).

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 7270705593 and 7270705602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7270705633) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3204645 + ... + 3206912.

Almost surely, 2^7270705638 is an apocalyptic number.

7270705638 is an abundant number, since it is smaller than the sum of its proper divisors (11348458794).

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

7270705638 is a wasteful number, since it uses less digits than its factorization.

7270705638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6411578 (or 6411569 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The square root of 7270705638 is about 85268.4328341972. The cubic root of 7270705638 is about 1937.2790741256.

The spelling of 7270705638 in words is "seven billion, two hundred seventy million, seven hundred five thousand, six hundred thirty-eight".