36991728 has 200 divisors, whose sum is σ = 119911968. Its totient is φ = 10948608.

The previous prime is 36991673. The next prime is 36991753. The reversal of 36991728 is 82719963.

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 506700 + ... + 506772.

Almost surely, 2^36991728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36991728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59955984).

36991728 is an abundant number, since it is smaller than the sum of its proper divisors (82920240).

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

36991728 is a wasteful number, since it uses less digits than its factorization.

36991728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 118 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 36991728 is about 6082.0825380785. The cubic root of 36991728 is about 333.1973507560.

The spelling of 36991728 in words is "thirty-six million, nine hundred ninety-one thousand, seven hundred twenty-eight".