71828145 has 24 divisors (see below), whose sum is σ = 131827176. Its totient is φ = 36054528.

The previous prime is 71828129. The next prime is 71828153. The reversal of 71828145 is 54182817.

It can be written as a sum of positive squares in 4 ways, for example, as 2322576 + 69505569 = 1524^2 + 8337^2 .

It is not a de Polignac number, because 71828145 - 2⁴ = 71828129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46182 + ... + 47711.

It is an arithmetic number, because the mean of its divisors is an integer number (5492799).

Almost surely, 2^71828145 is an apocalyptic number.

It is an amenable number.

71828145 is a deficient number, since it is larger than the sum of its proper divisors (59999031).

71828145 is a wasteful number, since it uses less digits than its factorization.

71828145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93921 (or 93918 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 71828145 is about 8475.1486712624. The cubic root of 71828145 is about 415.6855075757.

The spelling of 71828145 in words is "seventy-one million, eight hundred twenty-eight thousand, one hundred forty-five".