151728905 has 8 divisors (see below), whose sum is σ = 186515784. Its totient is φ = 118422400.

The previous prime is 151728887. The next prime is 151728947. The reversal of 151728905 is 509827151.

It can be written as a sum of positive squares in 4 ways, for example, as 3936256 + 147792649 = 1984^2 + 12157^2 .

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

It is not a de Polignac number, because 151728905 - 2⁸ = 151728649 is a prime.

It is a super-2 number, since 2×151728905² = 46043321224998050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369866 + ... + 370275.

It is an arithmetic number, because the mean of its divisors is an integer number (23314473).

Almost surely, 2^151728905 is an apocalyptic number.

It is an amenable number.

151728905 is a deficient number, since it is larger than the sum of its proper divisors (34786879).

151728905 is an equidigital number, since it uses as much as digits as its factorization.

151728905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740187.

The product of its (nonzero) digits is 25200, while the sum is 38.

The square root of 151728905 is about 12317.8287453593. The cubic root of 151728905 is about 533.3628644672.

The spelling of 151728905 in words is "one hundred fifty-one million, seven hundred twenty-eight thousand, nine hundred five".