161406732 has 48 divisors (see below), whose sum is σ = 399474432. Its totient is φ = 50614080.

The previous prime is 161406701. The next prime is 161406743. The reversal of 161406732 is 237604161.

It is a self number, because there is not a number n which added to its sum of digits gives 161406732.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12043 + ... + 21629.

It is an arithmetic number, because the mean of its divisors is an integer number (8322384).

Almost surely, 2^161406732 is an apocalyptic number.

161406732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161406732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199737216).

161406732 is an abundant number, since it is smaller than the sum of its proper divisors (238067700).

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

161406732 is a wasteful number, since it uses less digits than its factorization.

161406732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9678 (or 9676 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 161406732 is about 12704.5949168008. The cubic root of 161406732 is about 544.4699073781.

The spelling of 161406732 in words is "one hundred sixty-one million, four hundred six thousand, seven hundred thirty-two".