47445138 has 24 divisors (see below), whose sum is σ = 110705868. Its totient is φ = 14598432.

The previous prime is 47445133. The next prime is 47445143. The reversal of 47445138 is 83154474.

It is an interprime number because it is at equal distance from previous prime (47445133) and next prime (47445143).

It can be written as a sum of positive squares in 2 ways, for example, as 46744569 + 700569 = 6837^2 + 837^2 .

It is a super-2 number, since 2×47445138² = 4502082239678088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47445133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101145 + ... + 101612.

Almost surely, 2^47445138 is an apocalyptic number.

47445138 is an abundant number, since it is smaller than the sum of its proper divisors (63260730).

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

47445138 is a wasteful number, since it uses less digits than its factorization.

47445138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202778 (or 202775 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 47445138 is about 6888.0431183319. The cubic root of 47445138 is about 362.0183389669.

The spelling of 47445138 in words is "forty-seven million, four hundred forty-five thousand, one hundred thirty-eight".