2207138738 has 16 divisors (see below), whose sum is σ = 3784697664. Its totient is φ = 945658800.

The previous prime is 2207138737. The next prime is 2207138741. The reversal of 2207138738 is 8378317022.

It is a super-2 number, since 2×2207138738² = 9742922817560465288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2207138695 and 2207138704.

It is not an unprimeable number, because it can be changed into a prime (2207138737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37256 + ... + 76172.

It is an arithmetic number, because the mean of its divisors is an integer number (236543604).

Almost surely, 2^2207138738 is an apocalyptic number.

2207138738 is a deficient number, since it is larger than the sum of its proper divisors (1577558926).

2207138738 is a wasteful number, since it uses less digits than its factorization.

2207138738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42977.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 2207138738 is about 46980.1951677513. The cubic root of 2207138738 is about 1301.9966827900.

The spelling of 2207138738 in words is "two billion, two hundred seven million, one hundred thirty-eight thousand, seven hundred thirty-eight".