7281900 has 180 divisors, whose sum is σ = 25206720. Its totient is φ = 1814400.

The previous prime is 7281893. The next prime is 7281913. The reversal of 7281900 is 91827.

It is a tau number, because it is divible by the number of its divisors (180).

It is a super-2 number, since 2×7281900² = 106052135220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 234885 + ... + 234915.

Almost surely, 2^7281900 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 7281900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12603360).

7281900 is an abundant number, since it is smaller than the sum of its proper divisors (17924820).

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

7281900 is a wasteful number, since it uses less digits than its factorization.

7281900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 7281900 is about 2698.4995831017. The cubic root of 7281900 is about 193.8272809988.

It can be divided in two parts, 728 and 1900, that added together give a triangular number (2628 = T₇₂).

The spelling of 7281900 in words is "seven million, two hundred eighty-one thousand, nine hundred".