1538642835 has 12 divisors (see below), whose sum is σ = 2666980992. Its totient is φ = 820609488.

The previous prime is 1538642803. The next prime is 1538642843. The reversal of 1538642835 is 5382468351.

1538642835 is a `hidden beast` number, since 1 + 538 + 64 + 28 + 35 = 666.

It is not a de Polignac number, because 1538642835 - 2⁵ = 1538642803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 34192063 = 1538642835 / (1 + 5 + 3 + 8 + 6 + 4 + 2 + 8 + 3 + 5).

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, 17095987 + ... + 17096076.

It is an arithmetic number, because the mean of its divisors is an integer number (222248416).

Almost surely, 2^1538642835 is an apocalyptic number.

1538642835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1538642835 is a deficient number, since it is larger than the sum of its proper divisors (1128338157).

1538642835 is a wasteful number, since it uses less digits than its factorization.

1538642835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34192074 (or 34192071 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 1538642835 is about 39225.5380460230. The cubic root of 1538642835 is about 1154.4610179890.

The spelling of 1538642835 in words is "one billion, five hundred thirty-eight million, six hundred forty-two thousand, eight hundred thirty-five".