240528021 has 8 divisors (see below), whose sum is σ = 321657024. Its totient is φ = 159875520.

The previous prime is 240527993. The next prime is 240528047. The reversal of 240528021 is 120825042.

240528021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 240528021 - 2⁶ = 240527957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 240527982 and 240528000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240528091) 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, 117945 + ... + 119966.

It is an arithmetic number, because the mean of its divisors is an integer number (40207128).

Almost surely, 2^240528021 is an apocalyptic number.

It is an amenable number.

240528021 is a deficient number, since it is larger than the sum of its proper divisors (81129003).

240528021 is a wasteful number, since it uses less digits than its factorization.

240528021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238251.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 240528021 is about 15508.9658262568. The cubic root of 240528021 is about 621.9019129317.

The spelling of 240528021 in words is "two hundred forty million, five hundred twenty-eight thousand, twenty-one".