240645920 has 24 divisors (see below), whose sum is σ = 568526364. Its totient is φ = 96258304.

The previous prime is 240645919. The next prime is 240645947. The reversal of 240645920 is 29546042.

It can be written as a sum of positive squares in 2 ways, for example, as 220106896 + 20539024 = 14836^2 + 4532^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751859 + ... + 752178.

Almost surely, 2^240645920 is an apocalyptic number.

240645920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

240645920 is an abundant number, since it is smaller than the sum of its proper divisors (327880444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

240645920 is a wasteful number, since it uses less digits than its factorization.

240645920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504052 (or 1504044 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 240645920 is about 15512.7663554893. The cubic root of 240645920 is about 622.0035083531.

Subtracting from 240645920 its reverse (29546042), we obtain a triangular number (211099878 = T₂₀₅₄₇).

The spelling of 240645920 in words is "two hundred forty million, six hundred forty-five thousand, nine hundred twenty".