71138250 has 96 divisors (see below), whose sum is σ = 199652544. Its totient is φ = 18954000.

The previous prime is 71138227. The next prime is 71138257. The reversal of 71138250 is 5283117.

It is a super-2 number, since 2×71138250² = 10121301226125000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (71138257) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60165 + ... + 61335.

It is an arithmetic number, because the mean of its divisors is an integer number (2079714).

Almost surely, 2^71138250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71138250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99826272).

71138250 is an abundant number, since it is smaller than the sum of its proper divisors (128514294).

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

71138250 is a wasteful number, since it uses less digits than its factorization.

71138250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203 (or 1181 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 71138250 is about 8434.3494117804. The cubic root of 71138250 is about 414.3503650308.

The spelling of 71138250 in words is "seventy-one million, one hundred thirty-eight thousand, two hundred fifty".