28185849493040 has 40 divisors (see below), whose sum is σ = 65631541924080. Its totient is φ = 11257231521536.

The previous prime is 28185849493031. The next prime is 28185849493069. The reversal of 28185849493040 is 4039494858182.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×28185849493040² (a number of 28 digits) contains 22 as substring.

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, 267263759 + ... + 267369198.

It is an arithmetic number, because the mean of its divisors is an integer number (1640788548102).

Almost surely, 2^{28185849493040} is an apocalyptic number.

28185849493040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28185849493040 is an abundant number, since it is smaller than the sum of its proper divisors (37445692431040).

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

28185849493040 is a wasteful number, since it uses less digits than its factorization.

28185849493040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534633629 (or 534633623 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 65.

The spelling of 28185849493040 in words is "twenty-eight trillion, one hundred eighty-five billion, eight hundred forty-nine million, four hundred ninety-three thousand, forty".