7421880 has 64 divisors (see below), whose sum is σ = 22487040. Its totient is φ = 1959552.

The previous prime is 7421863. The next prime is 7421891. The reversal of 7421880 is 881247.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 14997 + ... + 15483.

It is an arithmetic number, because the mean of its divisors is an integer number (351360).

Almost surely, 2^7421880 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 7421880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11243520).

7421880 is an abundant number, since it is smaller than the sum of its proper divisors (15065160).

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

7421880 is a wasteful number, since it uses less digits than its factorization.

7421880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 7421880 is about 2724.3127573757. The cubic root of 7421880 is about 195.0613876417.

The spelling of 7421880 in words is "seven million, four hundred twenty-one thousand, eight hundred eighty".