161028874 has 4 divisors (see below), whose sum is σ = 241543314. Its totient is φ = 80514436.

The previous prime is 161028869. The next prime is 161028887. The reversal of 161028874 is 478820161.

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., 150185025 + 10843849 = 12255^2 + 3293^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40257217 + ... + 40257220.

Almost surely, 2^161028874 is an apocalyptic number.

161028874 is a deficient number, since it is larger than the sum of its proper divisors (80514440).

161028874 is an equidigital number, since it uses as much as digits as its factorization.

161028874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80514439.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 161028874 is about 12689.7152844341. The cubic root of 161028874 is about 544.0447019386.

It can be divided in two parts, 16102 and 8874, that added together give a triangular number (24976 = T₂₂₃).

The spelling of 161028874 in words is "one hundred sixty-one million, twenty-eight thousand, eight hundred seventy-four".