33161400 has 240 divisors, whose sum is σ = 121532400. Its totient is φ = 8363520.

The previous prime is 33161399. The next prime is 33161417. The reversal of 33161400 is 416133.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 372556 + ... + 372644.

It is an arithmetic number, because the mean of its divisors is an integer number (506385).

Almost surely, 2^33161400 is an apocalyptic number.

33161400 is a gapful number since it is divisible by the number (30) 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 33161400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60766200).

33161400 is an abundant number, since it is smaller than the sum of its proper divisors (88371000).

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

33161400 is a wasteful number, since it uses less digits than its factorization.

33161400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 33161400 is about 5758.5935782967. The cubic root of 33161400 is about 321.2755080756.

Adding to 33161400 its reverse (416133), we get a palindrome (33577533).

The spelling of 33161400 in words is "thirty-three million, one hundred sixty-one thousand, four hundred".