28380505862 has 8 divisors (see below), whose sum is σ = 42635359800. Its totient is φ = 14168719264.

The previous prime is 28380505861. The next prime is 28380505871. The reversal of 28380505862 is 26850508382.

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

It is a super-2 number, since 2×28380505862² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28380505861) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 10765187 + ... + 10767822.

It is an arithmetic number, because the mean of its divisors is an integer number (5329419975).

Almost surely, 2^28380505862 is an apocalyptic number.

28380505862 is a deficient number, since it is larger than the sum of its proper divisors (14254853938).

28380505862 is a wasteful number, since it uses less digits than its factorization.

28380505862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21533670.

The product of its (nonzero) digits is 921600, while the sum is 47.

The spelling of 28380505862 in words is "twenty-eight billion, three hundred eighty million, five hundred five thousand, eight hundred sixty-two".