7428666 has 32 divisors (see below), whose sum is σ = 17192448. Its totient is φ = 2095920.

The previous prime is 7428653. The next prime is 7428671. The reversal of 7428666 is 6668247.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2421 + ... + 4551.

It is an arithmetic number, because the mean of its divisors is an integer number (537264).

Almost surely, 2^7428666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7428666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8596224).

7428666 is an abundant number, since it is smaller than the sum of its proper divisors (9763782).

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

7428666 is a wasteful number, since it uses less digits than its factorization.

7428666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226.

The product of its digits is 96768, while the sum is 39.

The square root of 7428666 is about 2725.5579245358. The cubic root of 7428666 is about 195.1208192752.

The spelling of 7428666 in words is "seven million, four hundred twenty-eight thousand, six hundred sixty-six".