28249441605 has 128 divisors (see below), whose sum is σ = 63676108800. Its totient is φ = 11540793600.

The previous prime is 28249441573. The next prime is 28249441621. The reversal of 28249441605 is 50614494282.

It is a happy number.

It is not a de Polignac number, because 28249441605 - 2⁵ = 28249441573 is a prime.

It is a super-3 number, since 3×28249441605³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 590275 + ... + 636335.

It is an arithmetic number, because the mean of its divisors is an integer number (497469600).

Almost surely, 2^28249441605 is an apocalyptic number.

It is an amenable number.

28249441605 is an abundant number, since it is smaller than the sum of its proper divisors (35426667195).

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

28249441605 is a wasteful number, since it uses less digits than its factorization.

28249441605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46152 (or 46146 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 28249441605 in words is "twenty-eight billion, two hundred forty-nine million, four hundred forty-one thousand, six hundred five".