161315028 has 36 divisors (see below), whose sum is σ = 466021920. Its totient is φ = 46089936.

The previous prime is 161315003. The next prime is 161315039. The reversal of 161315028 is 820513161.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 161314992 and 161315010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319818 + ... + 320321.

Almost surely, 2^161315028 is an apocalyptic number.

161315028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161315028 is an abundant number, since it is smaller than the sum of its proper divisors (304706892).

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

161315028 is a wasteful number, since it uses less digits than its factorization.

161315028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640156 (or 640151 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 161315028 is about 12700.9853161084. The cubic root of 161315028 is about 544.3667734572.

Adding to 161315028 its reverse (820513161), we get a palindrome (981828189).

It can be divided in two parts, 1613 and 15028, that added together give a square (16641 = 129²).

The spelling of 161315028 in words is "one hundred sixty-one million, three hundred fifteen thousand, twenty-eight".