7072840 has 32 divisors (see below), whose sum is σ = 16032960. Its totient is φ = 2808000.

The previous prime is 7072831. The next prime is 7072841. The reversal of 7072840 is 482707.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7072799 and 7072808.

It is not an unprimeable number, because it can be changed into a prime (7072841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5455 + ... + 6625.

It is an arithmetic number, because the mean of its divisors is an integer number (501030).

Almost surely, 2^7072840 is an apocalyptic number.

It is an amenable number.

7072840 is an abundant number, since it is smaller than the sum of its proper divisors (8960120).

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

7072840 is a wasteful number, since it uses less digits than its factorization.

7072840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333 (or 1329 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 7072840 is about 2659.4811524055. The cubic root of 7072840 is about 191.9543438896.

The spelling of 7072840 in words is "seven million, seventy-two thousand, eight hundred forty".