71610140 has 48 divisors (see below), whose sum is σ = 175537152. Its totient is φ = 24027456.

The previous prime is 71610131. The next prime is 71610151. The reversal of 71610140 is 4101617.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1139 + ... + 12021.

It is an arithmetic number, because the mean of its divisors is an integer number (3657024).

Almost surely, 2^71610140 is an apocalyptic number.

71610140 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71610140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87768576).

71610140 is an abundant number, since it is smaller than the sum of its proper divisors (103927012).

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

71610140 is a wasteful number, since it uses less digits than its factorization.

71610140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10946 (or 10944 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 71610140 is about 8462.2774712249. The cubic root of 71610140 is about 415.2645335247.

Adding to 71610140 its reverse (4101617), we get a palindrome (75711757).

The spelling of 71610140 in words is "seventy-one million, six hundred ten thousand, one hundred forty".