161440048 has 80 divisors (see below), whose sum is σ = 396760320. Its totient is φ = 61804800.

The previous prime is 161440031. The next prime is 161440073. The reversal of 161440048 is 840044161.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 161439998 and 161440025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71578 + ... + 73798.

It is an arithmetic number, because the mean of its divisors is an integer number (4959504).

Almost surely, 2^161440048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161440048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198380160).

161440048 is an abundant number, since it is smaller than the sum of its proper divisors (235320272).

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

161440048 is a wasteful number, since it uses less digits than its factorization.

161440048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306 (or 2300 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 161440048 is about 12705.9060283004. The cubic root of 161440048 is about 544.5073661864.

The spelling of 161440048 in words is "one hundred sixty-one million, four hundred forty thousand, forty-eight".