87972030 has 48 divisors (see below), whose sum is σ = 231641280. Its totient is φ = 23160384.

The previous prime is 87971999. The next prime is 87972037. The reversal of 87972030 is 3027978.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87972037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 924 + ... + 13296.

It is an arithmetic number, because the mean of its divisors is an integer number (4825860).

Almost surely, 2^87972030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87972030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115820640).

87972030 is an abundant number, since it is smaller than the sum of its proper divisors (143669250).

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

87972030 is a wasteful number, since it uses less digits than its factorization.

87972030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12465 (or 12462 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 87972030 is about 9379.3405951591. The cubic root of 87972030 is about 444.7488883300.

The spelling of 87972030 in words is "eighty-seven million, nine hundred seventy-two thousand, thirty".