28155493333340 has 48 divisors (see below), whose sum is σ = 61173732422880. Its totient is φ = 10872361194240.

The previous prime is 28155493333339. The next prime is 28155493333343. The reversal of 28155493333340 is 4333339455182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28155493333343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 943175 + ... + 7563105.

It is an arithmetic number, because the mean of its divisors is an integer number (1274452758810).

Almost surely, 2^{28155493333340} is an apocalyptic number.

28155493333340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28155493333340 is an abundant number, since it is smaller than the sum of its proper divisors (33018239089540).

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

28155493333340 is a wasteful number, since it uses less digits than its factorization.

28155493333340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6627302 (or 6627300 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 53.

The spelling of 28155493333340 in words is "twenty-eight trillion, one hundred fifty-five billion, four hundred ninety-three million, three hundred thirty-three thousand, three hundred forty".