1403497728 has 108 divisors (see below), whose sum is σ = 4067216608. Its totient is φ = 465454080.

The previous prime is 1403497721. The next prime is 1403497729. The reversal of 1403497728 is 8277943041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1403497721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 484701 + ... + 487587.

Almost surely, 2^1403497728 is an apocalyptic number.

1403497728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1403497728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2033608304).

1403497728 is an abundant number, since it is smaller than the sum of its proper divisors (2663718880).

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

1403497728 is a wasteful number, since it uses less digits than its factorization.

1403497728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120 (or 3103 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 1403497728 is about 37463.2850668491. The cubic root of 1403497728 is about 1119.6198029251.

It can be divided in two parts, 1403497 and 728, that added together give a square (1404225 = 1185²).

The spelling of 1403497728 in words is "one billion, four hundred three million, four hundred ninety-seven thousand, seven hundred twenty-eight".