87722580 has 144 divisors (see below), whose sum is σ = 277244352. Its totient is φ = 20697600.

The previous prime is 87722573. The next prime is 87722603. The reversal of 87722580 is 8522778.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 312040 + ... + 312320.

It is an arithmetic number, because the mean of its divisors is an integer number (1925308).

Almost surely, 2^87722580 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87722580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138622176).

87722580 is an abundant number, since it is smaller than the sum of its proper divisors (189521772).

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

87722580 is a wasteful number, since it uses less digits than its factorization.

87722580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 87722580 is about 9366.0333119203. The cubic root of 87722580 is about 444.3281196031.

The spelling of 87722580 in words is "eighty-seven million, seven hundred twenty-two thousand, five hundred eighty".