28380143834 has 16 divisors (see below), whose sum is σ = 48780052800. Its totient is φ = 12130824384.

The previous prime is 28380143819. The next prime is 28380143863. The reversal of 28380143834 is 43834108382.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2669039 + ... + 2679650.

It is an arithmetic number, because the mean of its divisors is an integer number (3048753300).

Almost surely, 2^28380143834 is an apocalyptic number.

28380143834 is a deficient number, since it is larger than the sum of its proper divisors (20399908966).

28380143834 is a wasteful number, since it uses less digits than its factorization.

28380143834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5349077.

The product of its (nonzero) digits is 442368, while the sum is 44.

The spelling of 28380143834 in words is "twenty-eight billion, three hundred eighty million, one hundred forty-three thousand, eight hundred thirty-four".