7487640 has 80 divisors (see below), whose sum is σ = 25177680. Its totient is φ = 1995840.

The previous prime is 7487639. The next prime is 7487651. The reversal of 7487640 is 467847.

It is a happy number.

7487640 is a `hidden beast` number, since 7 + 4 + 8 + 7 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 7487595 and 7487604.

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, 2085 + ... + 4395.

It is an arithmetic number, because the mean of its divisors is an integer number (314721).

Almost surely, 2^7487640 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 7487640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12588840).

7487640 is an abundant number, since it is smaller than the sum of its proper divisors (17690040).

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

7487640 is a wasteful number, since it uses less digits than its factorization.

7487640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334 (or 2321 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 7487640 is about 2736.3552400958. The cubic root of 7487640 is about 195.6357945708.

The spelling of 7487640 in words is "seven million, four hundred eighty-seven thousand, six hundred forty".