1538820354 has 8 divisors (see below), whose sum is σ = 3077640720. Its totient is φ = 512940116.

The previous prime is 1538820347. The next prime is 1538820379. The reversal of 1538820354 is 4530288351.

It is a sphenic number, since it is the product of 3 distinct primes.

1538820354 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128235024 + ... + 128235035.

It is an arithmetic number, because the mean of its divisors is an integer number (384705090).

Almost surely, 2^1538820354 is an apocalyptic number.

1538820354 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1538820354 is a wasteful number, since it uses less digits than its factorization.

1538820354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256470064.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 1538820354 is about 39227.8007795492. The cubic root of 1538820354 is about 1154.5054144489.

The spelling of 1538820354 in words is "one billion, five hundred thirty-eight million, eight hundred twenty thousand, three hundred fifty-four".