1538887650 has 24 divisors (see below), whose sum is σ = 3816441744. Its totient is φ = 410370000.

The previous prime is 1538887643. The next prime is 1538887663. The reversal of 1538887650 is 567888351.

It is a junction number, because it is equal to n+sod(n) for n = 1538887593 and 1538887602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5129476 + ... + 5129775.

It is an arithmetic number, because the mean of its divisors is an integer number (159018406).

Almost surely, 2^1538887650 is an apocalyptic number.

1538887650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1538887650 is an abundant number, since it is smaller than the sum of its proper divisors (2277554094).

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

1538887650 is a wasteful number, since it uses less digits than its factorization.

1538887650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10259266 (or 10259261 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 51.

The square root of 1538887650 is about 39228.6585291927. The cubic root of 1538887650 is about 1154.5222438909.

The spelling of 1538887650 in words is "one billion, five hundred thirty-eight million, eight hundred eighty-seven thousand, six hundred fifty".