28582157420 has 24 divisors (see below), whose sum is σ = 60026085504. Its totient is φ = 11432185856.

The previous prime is 28582157407. The next prime is 28582157441. The reversal of 28582157420 is 2475128582.

It is a super-2 number, since 2×28582157420² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435269 + ... + 496611.

It is an arithmetic number, because the mean of its divisors is an integer number (2501086896).

Almost surely, 2^28582157420 is an apocalyptic number.

28582157420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28582157420 is an abundant number, since it is smaller than the sum of its proper divisors (31443928084).

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

28582157420 is a wasteful number, since it uses less digits than its factorization.

28582157420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84649 (or 84647 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 44.

The spelling of 28582157420 in words is "twenty-eight billion, five hundred eighty-two million, one hundred fifty-seven thousand, four hundred twenty".