240721983 has 32 divisors (see below), whose sum is σ = 361912320. Its totient is φ = 158124960.

The previous prime is 240721981. The next prime is 240721997. The reversal of 240721983 is 389127042.

240721983 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 240721983 - 2¹ = 240721981 is a prime.

It is a super-3 number, since 3×240721983³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240721981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 888138 + ... + 888408.

It is an arithmetic number, because the mean of its divisors is an integer number (11309760).

Almost surely, 2^240721983 is an apocalyptic number.

240721983 is a deficient number, since it is larger than the sum of its proper divisors (121190337).

240721983 is a wasteful number, since it uses less digits than its factorization.

240721983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 240721983 is about 15515.2177877077. The cubic root of 240721983 is about 622.0690354271.

The spelling of 240721983 in words is "two hundred forty million, seven hundred twenty-one thousand, nine hundred eighty-three".