30872500 has 60 divisors (see below), whose sum is σ = 69081012. Its totient is φ = 12064000.

The previous prime is 30872477. The next prime is 30872537. The reversal of 30872500 is 527803.

It can be written as a sum of positive squares in 10 ways, for example, as 24860196 + 6012304 = 4986^2 + 2452^2 .

It is a super-2 number, since 2×30872500² = 1906222512500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 132384 + ... + 132616.

Almost surely, 2^30872500 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 30872500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34540506).

30872500 is an abundant number, since it is smaller than the sum of its proper divisors (38208512).

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

30872500 is a wasteful number, since it uses less digits than its factorization.

30872500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 30872500 is about 5556.3027275338. The cubic root of 30872500 is about 313.7068002933.

The spelling of 30872500 in words is "thirty million, eight hundred seventy-two thousand, five hundred".