731540156 has 12 divisors (see below), whose sum is σ = 1289968680. Its totient is φ = 362977680.

The previous prime is 731540153. The next prime is 731540177. The reversal of 731540156 is 651045137.

It is a super-3 number, since 3×731540156³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731540153) 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 3 ways as a sum of consecutive naturals, for example, 697511 + ... + 698558.

It is an arithmetic number, because the mean of its divisors is an integer number (107497390).

Almost surely, 2^731540156 is an apocalyptic number.

It is an amenable number.

731540156 is a deficient number, since it is larger than the sum of its proper divisors (558428524).

731540156 is a wasteful number, since it uses less digits than its factorization.

731540156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396204 (or 1396202 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 731540156 is about 27046.9990202240. Note that the first 3 decimals coincide. The cubic root of 731540156 is about 901.0441199006.

The spelling of 731540156 in words is "seven hundred thirty-one million, five hundred forty thousand, one hundred fifty-six".