1538490802 has 4 divisors (see below), whose sum is σ = 2307736206. Its totient is φ = 769245400.

The previous prime is 1538490799. The next prime is 1538490817. The reversal of 1538490802 is 2080948351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2080948351 = 24659 ⋅84389.

It can be written as a sum of positive squares in only one way, i.e., 1036775601 + 501715201 = 32199^2 + 22399^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384622699 + ... + 384622702.

Almost surely, 2^1538490802 is an apocalyptic number.

1538490802 is a deficient number, since it is larger than the sum of its proper divisors (769245404).

1538490802 is an equidigital number, since it uses as much as digits as its factorization.

1538490802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769245403.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 1538490802 is about 39223.6000642470. The cubic root of 1538490802 is about 1154.4229927135.

The spelling of 1538490802 in words is "one billion, five hundred thirty-eight million, four hundred ninety thousand, eight hundred two".