71631028 has 12 divisors (see below), whose sum is σ = 143262112. Its totient is φ = 30699000.

The previous prime is 71631017. The next prime is 71631029. The reversal of 71631028 is 82013617.

71631028 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 2558251 = 71631028 / (7 + 1 + 6 + 3 + 1 + 0 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 71630987 and 71631005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71631029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1279098 + ... + 1279153.

Almost surely, 2^71631028 is an apocalyptic number.

It is an amenable number.

71631028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71631028 is a wasteful number, since it uses less digits than its factorization.

71631028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558262 (or 2558260 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 71631028 is about 8463.5115643567. The cubic root of 71631028 is about 415.3049058441.

The spelling of 71631028 in words is "seventy-one million, six hundred thirty-one thousand, twenty-eight".