240428281 has 8 divisors (see below), whose sum is σ = 248556800. Its totient is φ = 232323120.

The previous prime is 240428239. The next prime is 240428291. The reversal of 240428281 is 182824042.

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

It is a cyclic number.

It is not a de Polignac number, because 240428281 - 2¹¹ = 240426233 is a prime.

It is a super-2 number, since 2×240428281² = 115611516609229922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240428231) 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, 16510 + ... + 27448.

It is an arithmetic number, because the mean of its divisors is an integer number (31069600).

Almost surely, 2^240428281 is an apocalyptic number.

It is an amenable number.

240428281 is a deficient number, since it is larger than the sum of its proper divisors (8128519).

240428281 is a wasteful number, since it uses less digits than its factorization.

240428281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11679.

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 240428281 is about 15505.7499334924. The cubic root of 240428281 is about 621.8159394800.

It can be divided in two parts, 24042 and 8281, that added together give a palindrome (32323).

The spelling of 240428281 in words is "two hundred forty million, four hundred twenty-eight thousand, two hundred eighty-one".