7421888 has 28 divisors (see below), whose sum is σ = 14904720. Its totient is φ = 3666432.

The previous prime is 7421863. The next prime is 7421891. The reversal of 7421888 is 8881247.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5045 + ... + 6347.

Almost surely, 2^7421888 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 7421888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7452360).

7421888 is an abundant number, since it is smaller than the sum of its proper divisors (7482832).

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

7421888 is a wasteful number, since it uses less digits than its factorization.

7421888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404 (or 1394 counting only the distinct ones).

The product of its digits is 28672, while the sum is 38.

The square root of 7421888 is about 2724.3142256355. The cubic root of 7421888 is about 195.0614577269.

The spelling of 7421888 in words is "seven million, four hundred twenty-one thousand, eight hundred eighty-eight".