1528381872 has 100 divisors (see below), whose sum is σ = 4683858696. Its totient is φ = 479485440.

The previous prime is 1528381849. The next prime is 1528381891. The reversal of 1528381872 is 2781838251.

It is a super-2 number, since 2×1528381872² = 4671902293316448768, which contains 22 as substring.

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 19 ways as a sum of consecutive naturals, for example, 12654 + ... + 56717.

Almost surely, 2^1528381872 is an apocalyptic number.

1528381872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1528381872 is an abundant number, since it is smaller than the sum of its proper divisors (3155476824).

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

1528381872 is a wasteful number, since it uses less digits than its factorization.

1528381872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69408 (or 69393 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 1528381872 is about 39094.5248340481. The cubic root of 1528381872 is about 1151.8889866983. Note that the first 3 decimals are identical.

The spelling of 1528381872 in words is "one billion, five hundred twenty-eight million, three hundred eighty-one thousand, eight hundred seventy-two".