71228136 has 32 divisors (see below), whose sum is σ = 203509440. Its totient is φ = 20350848.

The previous prime is 71228107. The next prime is 71228137. The reversal of 71228136 is 63182217.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (71228137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211821 + ... + 212156.

It is an arithmetic number, because the mean of its divisors is an integer number (6359670).

Almost surely, 2^71228136 is an apocalyptic number.

It is an amenable number.

71228136 is an abundant number, since it is smaller than the sum of its proper divisors (132281304).

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

71228136 is a wasteful number, since it uses less digits than its factorization.

71228136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423993 (or 423989 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 71228136 is about 8439.6762971100. The cubic root of 71228136 is about 414.5248076191.

The spelling of 71228136 in words is "seventy-one million, two hundred twenty-eight thousand, one hundred thirty-six".