731487428 has 24 divisors (see below), whose sum is σ = 1487774400. Its totient is φ = 308180448.

The previous prime is 731487409. The next prime is 731487433. The reversal of 731487428 is 824784137.

731487428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219743 + ... + 223046.

It is an arithmetic number, because the mean of its divisors is an integer number (61990600).

Almost surely, 2^731487428 is an apocalyptic number.

It is an amenable number.

731487428 is an abundant number, since it is smaller than the sum of its proper divisors (756286972).

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

731487428 is a wasteful number, since it uses less digits than its factorization.

731487428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442859 (or 442857 counting only the distinct ones).

The product of its digits is 301056, while the sum is 44.

The square root of 731487428 is about 27046.0242549621. The cubic root of 731487428 is about 901.0224708745.

The spelling of 731487428 in words is "seven hundred thirty-one million, four hundred eighty-seven thousand, four hundred twenty-eight".