7487664 has 40 divisors (see below), whose sum is σ = 19760640. Its totient is φ = 2442048.

The previous prime is 7487657. The next prime is 7487677. The reversal of 7487664 is 4667847.

It is a super-2 number, since 2×7487664² = 112130224353792, which contains 22 as substring.

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 597 + ... + 3915.

It is an arithmetic number, because the mean of its divisors is an integer number (494016).

Almost surely, 2^7487664 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 7487664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9880320).

7487664 is an abundant number, since it is smaller than the sum of its proper divisors (12272976).

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

7487664 is a wasteful number, since it uses less digits than its factorization.

7487664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3377 (or 3371 counting only the distinct ones).

The product of its digits is 225792, while the sum is 42.

The square root of 7487664 is about 2736.3596254878. The cubic root of 7487664 is about 195.6360035933.

The spelling of 7487664 in words is "seven million, four hundred eighty-seven thousand, six hundred sixty-four".