7287489 has 20 divisors (see below), whose sum is σ = 11877360. Its totient is φ = 4416120.

The previous prime is 7287473. The next prime is 7287493. The reversal of 7287489 is 9847827.

It is not a de Polignac number, because 7287489 - 2⁴ = 7287473 is a prime.

It is a super-3 number, since 3×7287489³ (a number of 22 digits) contains 333 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7287499) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3199 + ... + 4980.

It is an arithmetic number, because the mean of its divisors is an integer number (593868).

Almost surely, 2^7287489 is an apocalyptic number.

It is an amenable number.

7287489 is a deficient number, since it is larger than the sum of its proper divisors (4589871).

7287489 is a wasteful number, since it uses less digits than its factorization.

7287489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8202 (or 8193 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 7287489 is about 2699.5349599514. The cubic root of 7287489 is about 193.8768570545.

It can be divided in two parts, 7287 and 489, that added together give a 5-th power (7776 = 6⁵).

The spelling of 7287489 in words is "seven million, two hundred eighty-seven thousand, four hundred eighty-nine".