161245928 has 32 divisors (see below), whose sum is σ = 311574600. Its totient is φ = 78194688.

The previous prime is 161245871. The next prime is 161245937. The reversal of 161245928 is 829542161.

161245928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 115304644 + 45941284 = 10738^2 + 6778^2 .

It is a junction number, because it is equal to n+sod(n) for n = 161245891 and 161245900.

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, 35600 + ... + 39872.

Almost surely, 2^161245928 is an apocalyptic number.

It is an amenable number.

161245928 is a deficient number, since it is larger than the sum of its proper divisors (150328672).

161245928 is a wasteful number, since it uses less digits than its factorization.

161245928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421 (or 4417 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 161245928 is about 12698.2647633446. The cubic root of 161245928 is about 544.2890350577.

The spelling of 161245928 in words is "one hundred sixty-one million, two hundred forty-five thousand, nine hundred twenty-eight".