161087724 has 48 divisors (see below), whose sum is σ = 477299200. Its totient is φ = 46024848.

The previous prime is 161087701. The next prime is 161087741. The reversal of 161087724 is 427780161.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105784 + ... + 107295.

Almost surely, 2^161087724 is an apocalyptic number.

161087724 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161087724 is an abundant number, since it is smaller than the sum of its proper divisors (316211476).

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

161087724 is a wasteful number, since it uses less digits than its factorization.

161087724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213099 (or 213091 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 161087724 is about 12692.0338795640. The cubic root of 161087724 is about 544.1109698287.

It can be divided in two parts, 16108 and 7724, that added together give a palindrome (23832).

The spelling of 161087724 in words is "one hundred sixty-one million, eighty-seven thousand, seven hundred twenty-four".