731333428 has 36 divisors (see below), whose sum is σ = 1490624100. Its totient is φ = 313041792.

The previous prime is 731333419. The next prime is 731333483. The reversal of 731333428 is 824333137.

731333428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 383063184 + 348270244 = 19572^2 + 18662^2 .

It is a junction number, because it is equal to n+sod(n) for n = 731333393 and 731333402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203826 + ... + 207382.

It is an arithmetic number, because the mean of its divisors is an integer number (41406225).

Almost surely, 2^731333428 is an apocalyptic number.

It is an amenable number.

731333428 is an abundant number, since it is smaller than the sum of its proper divisors (759290672).

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

731333428 is a wasteful number, since it uses less digits than its factorization.

731333428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4624 (or 4615 counting only the distinct ones).

The product of its digits is 36288, while the sum is 34.

The square root of 731333428 is about 27043.1771062499. The cubic root of 731333428 is about 900.9592357028.

The spelling of 731333428 in words is "seven hundred thirty-one million, three hundred thirty-three thousand, four hundred twenty-eight".