7240128 has 56 divisors (see below), whose sum is σ = 21896832. Its totient is φ = 2068224.

The previous prime is 7240117. The next prime is 7240133. The reversal of 7240128 is 8210427.

7240128 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 7240098 and 7240107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1350 + ... + 4037.

Almost surely, 2^7240128 is an apocalyptic number.

It is an amenable number.

7240128 is an abundant number, since it is smaller than the sum of its proper divisors (14656704).

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

7240128 is a wasteful number, since it uses less digits than its factorization.

7240128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5409 (or 5399 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 7240128 is about 2690.7485947223. The cubic root of 7240128 is about 193.4559454756.

Subtracting 7240128 from its reverse (8210427), we obtain a cube (970299 = 99³).

The spelling of 7240128 in words is "seven million, two hundred forty thousand, one hundred twenty-eight".