240428081 has 4 divisors (see below), whose sum is σ = 243814464. Its totient is φ = 237041700.

The previous prime is 240428053. The next prime is 240428117. The reversal of 240428081 is 180824042.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 240428081 - 2⁶ = 240428017 is a prime.

It is a super-2 number, since 2×240428081² = 115611324266685122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240428021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1693085 + ... + 1693226.

It is an arithmetic number, because the mean of its divisors is an integer number (60953616).

Almost surely, 2^240428081 is an apocalyptic number.

It is an amenable number.

240428081 is a deficient number, since it is larger than the sum of its proper divisors (3386383).

240428081 is an equidigital number, since it uses as much as digits as its factorization.

240428081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386382.

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 240428081 is about 15505.7434842706. The cubic root of 240428081 is about 621.8157670610.

It can be divided in two parts, 24042 and 8081, that added together give a palindrome (32123).

The spelling of 240428081 in words is "two hundred forty million, four hundred twenty-eight thousand, eighty-one".