161427740 has 12 divisors (see below), whose sum is σ = 338998296. Its totient is φ = 64571088.

The previous prime is 161427737. The next prime is 161427769. The reversal of 161427740 is 47724161.

161427740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 161427697 and 161427706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4035674 + ... + 4035713.

It is an arithmetic number, because the mean of its divisors is an integer number (28249858).

Almost surely, 2^161427740 is an apocalyptic number.

161427740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161427740 is an abundant number, since it is smaller than the sum of its proper divisors (177570556).

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

161427740 is a wasteful number, since it uses less digits than its factorization.

161427740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8071396 (or 8071394 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 161427740 is about 12705.4216773785. The cubic root of 161427740 is about 544.4935283003.

The spelling of 161427740 in words is "one hundred sixty-one million, four hundred twenty-seven thousand, seven hundred forty".