71087380 has 96 divisors (see below), whose sum is σ = 185713920. Its totient is φ = 22256640.

The previous prime is 71087369. The next prime is 71087383. The reversal of 71087380 is 8378017.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71087383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 252840 + ... + 253120.

It is an arithmetic number, because the mean of its divisors is an integer number (1934520).

Almost surely, 2^71087380 is an apocalyptic number.

71087380 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 71087380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92856960).

71087380 is an abundant number, since it is smaller than the sum of its proper divisors (114626540).

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

71087380 is a wasteful number, since it uses less digits than its factorization.

71087380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 71087380 is about 8431.3332279065. Note that the first 3 decimals coincide. The cubic root of 71087380 is about 414.2515760330.

The spelling of 71087380 in words is "seventy-one million, eighty-seven thousand, three hundred eighty".