71148090 has 32 divisors (see below), whose sum is σ = 183891456. Its totient is φ = 17513280.

The previous prime is 71148059. The next prime is 71148097. The reversal of 71148090 is 9084117.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71148097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90826 + ... + 91605.

It is an arithmetic number, because the mean of its divisors is an integer number (5746608).

Almost surely, 2^71148090 is an apocalyptic number.

71148090 is an abundant number, since it is smaller than the sum of its proper divisors (112743366).

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

71148090 is a wasteful number, since it uses less digits than its factorization.

71148090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182454.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 71148090 is about 8434.9327205378. The cubic root of 71148090 is about 414.3694687695.

The spelling of 71148090 in words is "seventy-one million, one hundred forty-eight thousand, ninety".