161748240 has 40 divisors (see below), whose sum is σ = 501420288. Its totient is φ = 43132800.

The previous prime is 161748227. The next prime is 161748263. The reversal of 161748240 is 42847161.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336736 + ... + 337215.

Almost surely, 2^161748240 is an apocalyptic number.

161748240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161748240 is an abundant number, since it is smaller than the sum of its proper divisors (339672048).

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

161748240 is a wasteful number, since it uses less digits than its factorization.

161748240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673967 (or 673961 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 161748240 is about 12718.0281490489. The cubic root of 161748240 is about 544.8536374359.

The spelling of 161748240 in words is "one hundred sixty-one million, seven hundred forty-eight thousand, two hundred forty".