1498728505 has 4 divisors (see below), whose sum is σ = 1798474212. Its totient is φ = 1198982800.

The previous prime is 1498728503. The next prime is 1498728521. The reversal of 1498728505 is 5058278941.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 551874064 + 946854441 = 23492^2 + 30771^2 .

It is not a de Polignac number, because 1498728505 - 2¹ = 1498728503 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1498728503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149872846 + ... + 149872855.

It is an arithmetic number, because the mean of its divisors is an integer number (449618553).

Almost surely, 2^1498728505 is an apocalyptic number.

It is an amenable number.

1498728505 is a deficient number, since it is larger than the sum of its proper divisors (299745707).

1498728505 is an equidigital number, since it uses as much as digits as its factorization.

1498728505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299745706.

The product of its (nonzero) digits is 806400, while the sum is 49.

The square root of 1498728505 is about 38713.4150521496. The cubic root of 1498728505 is about 1144.3907070229.

The spelling of 1498728505 in words is "one billion, four hundred ninety-eight million, seven hundred twenty-eight thousand, five hundred five".