47138128 has 10 divisors (see below), whose sum is σ = 91330154. Its totient is φ = 23569056.

The previous prime is 47138083. The next prime is 47138129. The reversal of 47138128 is 82183174.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 29899024 + 17239104 = 5468^2 + 4152^2 .

It is a super-2 number, since 2×47138128² = 4444006222688768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47138093 and 47138102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47138129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1473051 + ... + 1473082.

Almost surely, 2^47138128 is an apocalyptic number.

It is an amenable number.

47138128 is a deficient number, since it is larger than the sum of its proper divisors (44192026).

47138128 is a wasteful number, since it uses less digits than its factorization.

47138128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946141 (or 2946135 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 47138128 is about 6865.7212294121. The cubic root of 47138128 is about 361.2357941118.

The spelling of 47138128 in words is "forty-seven million, one hundred thirty-eight thousand, one hundred twenty-eight".