161408620 has 24 divisors (see below), whose sum is σ = 342770400. Its totient is φ = 63837312.

The previous prime is 161408587. The next prime is 161408633. The reversal of 161408620 is 26804161.

It is a super-2 number, since 2×161408620² = 52105485220608800, which contains 22 as substring.

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, 43560 + ... + 47119.

It is an arithmetic number, because the mean of its divisors is an integer number (14282100).

Almost surely, 2^161408620 is an apocalyptic number.

161408620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161408620 is an abundant number, since it is smaller than the sum of its proper divisors (181361780).

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

161408620 is a wasteful number, since it uses less digits than its factorization.

161408620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90777 (or 90775 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 161408620 is about 12704.6692204087. The cubic root of 161408620 is about 544.4720302866.

The spelling of 161408620 in words is "one hundred sixty-one million, four hundred eight thousand, six hundred twenty".