161427288 has 32 divisors (see below), whose sum is σ = 440256960. Its totient is φ = 48917280.

The previous prime is 161427283. The next prime is 161427319. The reversal of 161427288 is 882724161.

It is a happy number.

It is a super-2 number, since 2×161427288² = 52117538622069888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161427283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305470 + ... + 305997.

It is an arithmetic number, because the mean of its divisors is an integer number (13758030).

Almost surely, 2^161427288 is an apocalyptic number.

It is an amenable number.

161427288 is an abundant number, since it is smaller than the sum of its proper divisors (278829672).

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

161427288 is a wasteful number, since it uses less digits than its factorization.

161427288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611487 (or 611483 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 161427288 is about 12705.4038896841. The cubic root of 161427288 is about 544.4930201033.

The spelling of 161427288 in words is "one hundred sixty-one million, four hundred twenty-seven thousand, two hundred eighty-eight".