731540020 has 24 divisors (see below), whose sum is σ = 1536843168. Its totient is φ = 292500000.

The previous prime is 731540003. The next prime is 731540027. The reversal of 731540020 is 20045137.

731540020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 731539973 and 731540000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731540027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59395 + ... + 70645.

It is an arithmetic number, because the mean of its divisors is an integer number (64035132).

Almost surely, 2^731540020 is an apocalyptic number.

It is an amenable number.

731540020 is an abundant number, since it is smaller than the sum of its proper divisors (805303148).

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

731540020 is a wasteful number, since it uses less digits than its factorization.

731540020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14511 (or 14509 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 731540020 is about 27046.9965060818. The cubic root of 731540020 is about 901.0440640632.

Adding to 731540020 its reverse (20045137), we get a palindrome (751585157).

The spelling of 731540020 in words is "seven hundred thirty-one million, five hundred forty thousand, twenty".