7021408 has 24 divisors (see below), whose sum is σ = 14637672. Its totient is φ = 3303936.

The previous prime is 7021381. The next prime is 7021423. The reversal of 7021408 is 8041207.

It is an Ulam 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, 5910 + ... + 6997.

It is an arithmetic number, because the mean of its divisors is an integer number (609903).

Almost surely, 2^7021408 is an apocalyptic number.

It is an amenable number.

7021408 is an abundant number, since it is smaller than the sum of its proper divisors (7616264).

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

7021408 is a wasteful number, since it uses less digits than its factorization.

7021408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12934 (or 12926 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 7021408 is about 2649.7939542538. The cubic root of 7021408 is about 191.4879294862.

The spelling of 7021408 in words is "seven million, twenty-one thousand, four hundred eight".