161902336 has 72 divisors (see below), whose sum is σ = 348493824. Its totient is φ = 74849280.

The previous prime is 161902327. The next prime is 161902369. The reversal of 161902336 is 633209161.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 161902298 and 161902307.

It is a congruent number.

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, 182085 + ... + 182971.

It is an arithmetic number, because the mean of its divisors is an integer number (4840192).

Almost surely, 2^161902336 is an apocalyptic number.

161902336 is a gapful number since it is divisible by the number (16) 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 161902336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174246912).

161902336 is an abundant number, since it is smaller than the sum of its proper divisors (186591488).

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

161902336 is an equidigital number, since it uses as much as digits as its factorization.

161902336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957 (or 943 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 161902336 is about 12724.0848786858. The cubic root of 161902336 is about 545.0266081333.

The spelling of 161902336 in words is "one hundred sixty-one million, nine hundred two thousand, three hundred thirty-six".