731362428 has 72 divisors (see below), whose sum is σ = 1925095536. Its totient is φ = 233913600.

The previous prime is 731362427. The next prime is 731362439. The reversal of 731362428 is 824263137.

It is a happy number.

731362428 is a `hidden beast` number, since 7 + 3 + 1 + 3 + 624 + 28 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 731362392 and 731362401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731362427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85975 + ... + 94097.

It is an arithmetic number, because the mean of its divisors is an integer number (26737438).

Almost surely, 2^731362428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731362428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (962547768).

731362428 is an abundant number, since it is smaller than the sum of its proper divisors (1193733108).

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

731362428 is a wasteful number, since it uses less digits than its factorization.

731362428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8235 (or 8230 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 731362428 is about 27043.7132805390. The cubic root of 731362428 is about 900.9711443032.

The spelling of 731362428 in words is "seven hundred thirty-one million, three hundred sixty-two thousand, four hundred twenty-eight".