161094240 has 72 divisors (see below), whose sum is σ = 549739008. Its totient is φ = 42958080.

The previous prime is 161094233. The next prime is 161094247. The reversal of 161094240 is 42490161.

161094240 is a `hidden beast` number, since 1 + 610 + 9 + 4 + 2 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (161094233) and next prime (161094247).

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×161094240² = 51902708322355200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161094247) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 54496 + ... + 57375.

It is an arithmetic number, because the mean of its divisors is an integer number (7635264).

Almost surely, 2^161094240 is an apocalyptic number.

161094240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161094240 is an abundant number, since it is smaller than the sum of its proper divisors (388644768).

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

161094240 is a wasteful number, since it uses less digits than its factorization.

161094240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111892 (or 111881 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 161094240 is about 12692.2905734150. The cubic root of 161094240 is about 544.1183061611.

The spelling of 161094240 in words is "one hundred sixty-one million, ninety-four thousand, two hundred forty".