87969392280 has 1344 divisors, whose sum is σ = 391599165600. Its totient is φ = 17557585920.

The previous prime is 87969392239. The next prime is 87969392299. The reversal of 87969392280 is 8229396978.

87969392280 is a `hidden beast` number, since 87 + 96 + 9 + 392 + 2 + 80 = 666.

It is a super-2 number, since 2×87969392280² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 455799864 + ... + 455800056.

Almost surely, 2^87969392280 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 87969392280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195799582800).

87969392280 is an abundant number, since it is smaller than the sum of its proper divisors (303629773320).

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

87969392280 is a wasteful number, since it uses less digits than its factorization.

87969392280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

It can be divided in two parts, 87969 and 392280, that added together give a square (480249 = 693²).

The spelling of 87969392280 in words is "eighty-seven billion, nine hundred sixty-nine million, three hundred ninety-two thousand, two hundred eighty".