731001532240 has 80 divisors (see below), whose sum is σ = 1942796545920. Its totient is φ = 250574768640.

The previous prime is 731001532229. The next prime is 731001532249. The reversal of 731001532240 is 42235100137.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 731001532199 and 731001532208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731001532249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2487826 + ... + 2766094.

It is an arithmetic number, because the mean of its divisors is an integer number (24284956824).

Almost surely, 2^731001532240 is an apocalyptic number.

731001532240 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

731001532240 is an abundant number, since it is smaller than the sum of its proper divisors (1211795013680).

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

731001532240 is a wasteful number, since it uses less digits than its factorization.

731001532240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282980 (or 282974 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

Adding to 731001532240 its reverse (42235100137), we get a palindrome (773236632377).

The spelling of 731001532240 in words is "seven hundred thirty-one billion, one million, five hundred thirty-two thousand, two hundred forty".