36447440 has 60 divisors (see below), whose sum is σ = 87002244. Its totient is φ = 14197248.

The previous prime is 36447431. The next prime is 36447449. The reversal of 36447440 is 4474463.

It is an interprime number because it is at equal distance from previous prime (36447431) and next prime (36447449).

It can be written as a sum of positive squares in 2 ways, for example, as 16875664 + 19571776 = 4108^2 + 4424^2 .

It is a junction number, because it is equal to n+sod(n) for n = 36447397 and 36447406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36447449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 461321 + ... + 461399.

Almost surely, 2^36447440 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 36447440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43501122).

36447440 is an abundant number, since it is smaller than the sum of its proper divisors (50554804).

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

36447440 is an equidigital number, since it uses as much as digits as its factorization.

36447440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 32.

The square root of 36447440 is about 6037.1715231555. The cubic root of 36447440 is about 331.5550724567. Note that the first 3 decimals are identical.

The spelling of 36447440 in words is "thirty-six million, four hundred forty-seven thousand, four hundred forty".