28390493755 has 8 divisors (see below), whose sum is σ = 36689253552. Its totient is φ = 20965287648.

The previous prime is 28390493753. The next prime is 28390493759. The reversal of 28390493755 is 55739409382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28390493755 - 2¹ = 28390493753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28390493696 and 28390493705.

It is not an unprimeable number, because it can be changed into a prime (28390493753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218388349 + ... + 218388478.

It is an arithmetic number, because the mean of its divisors is an integer number (4586156694).

Almost surely, 2^28390493755 is an apocalyptic number.

28390493755 is a deficient number, since it is larger than the sum of its proper divisors (8298759797).

28390493755 is a wasteful number, since it uses less digits than its factorization.

28390493755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436776845.

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 28390493755 in words is "twenty-eight billion, three hundred ninety million, four hundred ninety-three thousand, seven hundred fifty-five".