28158011040 has 48 divisors (see below), whose sum is σ = 88697736288. Its totient is φ = 7508802816.

The previous prime is 28158011033. The next prime is 28158011053. The reversal of 28158011040 is 4011085182.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 28158010989 and 28158011007.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29330782 + ... + 29331741.

It is an arithmetic number, because the mean of its divisors is an integer number (1847869506).

Almost surely, 2^28158011040 is an apocalyptic number.

28158011040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28158011040 is an abundant number, since it is smaller than the sum of its proper divisors (60539725248).

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

28158011040 is a wasteful number, since it uses less digits than its factorization.

28158011040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58662541 (or 58662533 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 30.

The spelling of 28158011040 in words is "twenty-eight billion, one hundred fifty-eight million, eleven thousand, forty".