36861440 has 240 divisors, whose sum is σ = 117554976. Its totient is φ = 10813440.

The previous prime is 36861439. The next prime is 36861481. The reversal of 36861440 is 4416863.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 36861397 and 36861406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2168312 + ... + 2168328.

Almost surely, 2^36861440 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 36861440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58777488).

36861440 is an abundant number, since it is smaller than the sum of its proper divisors (80693536).

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

36861440 is a wasteful number, since it uses less digits than its factorization.

36861440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 36861440 is about 6071.3622853524. The cubic root of 36861440 is about 332.8057074958.

The spelling of 36861440 in words is "thirty-six million, eight hundred sixty-one thousand, four hundred forty".