161612304 has 40 divisors (see below), whose sum is σ = 477142080. Its totient is φ = 46174848.

The previous prime is 161612303. The next prime is 161612327. The reversal of 161612304 is 403216161.

It is a super-2 number, since 2×161612304² = 52237073608376832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (161612303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240159 + ... + 240830.

It is an arithmetic number, because the mean of its divisors is an integer number (11928552).

Almost surely, 2^161612304 is an apocalyptic number.

161612304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161612304 is an abundant number, since it is smaller than the sum of its proper divisors (315529776).

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

161612304 is a wasteful number, since it uses less digits than its factorization.

161612304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481007 (or 481001 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 161612304 is about 12712.6828010456. The cubic root of 161612304 is about 544.7009598708.

Adding to 161612304 its reverse (403216161), we get a palindrome (564828465).

The spelling of 161612304 in words is "one hundred sixty-one million, six hundred twelve thousand, three hundred four".