28215453106 has 4 divisors (see below), whose sum is σ = 42323179662. Its totient is φ = 14107726552.

The previous prime is 28215453029. The next prime is 28215453137. The reversal of 28215453106 is 60135451282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16703236081 + 11512217025 = 129241^2 + 107295^2 .

It is a super-2 number, since 2×28215453106² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7053863275 + ... + 7053863278.

Almost surely, 2^28215453106 is an apocalyptic number.

28215453106 is a deficient number, since it is larger than the sum of its proper divisors (14107726556).

28215453106 is a wasteful number, since it uses less digits than its factorization.

28215453106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14107726555.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 28215453106 in words is "twenty-eight billion, two hundred fifteen million, four hundred fifty-three thousand, one hundred six".