161290470 has 32 divisors (see below), whose sum is σ = 422288640. Its totient is φ = 39100640.

The previous prime is 161290469. The next prime is 161290477. The reversal of 161290470 is 74092161.

It is a happy number.

161290470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161290477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244050 + ... + 244709.

It is an arithmetic number, because the mean of its divisors is an integer number (13196520).

Almost surely, 2^161290470 is an apocalyptic number.

161290470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161290470 is an abundant number, since it is smaller than the sum of its proper divisors (260998170).

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

161290470 is a wasteful number, since it uses less digits than its factorization.

161290470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488780.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 161290470 is about 12700.0185039235. The cubic root of 161290470 is about 544.3391479309.

The spelling of 161290470 in words is "one hundred sixty-one million, two hundred ninety thousand, four hundred seventy".