240987819 has 12 divisors (see below), whose sum is σ = 326029496. Its totient is φ = 158306688.

The previous prime is 240987809. The next prime is 240987821. The reversal of 240987819 is 918789042.

It is not a de Polignac number, because 240987819 - 2⁵ = 240987787 is a prime.

It is a super-2 number, since 2×240987819² = 116150257812753522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240987809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229207 + ... + 230255.

Almost surely, 2^240987819 is an apocalyptic number.

240987819 is a deficient number, since it is larger than the sum of its proper divisors (85041677).

240987819 is an frugal number, since it uses more digits than its factorization.

240987819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174 (or 1125 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 240987819 is about 15523.7823677092. The cubic root of 240987819 is about 622.2979405811.

The spelling of 240987819 in words is "two hundred forty million, nine hundred eighty-seven thousand, eight hundred nineteen".