40036400 has 60 divisors (see below), whose sum is σ = 97237824. Its totient is φ = 15840000.

The previous prime is 40036391. The next prime is 40036417. The reversal of 40036400 is 463004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39905 + ... + 40895.

Almost surely, 2^40036400 is an apocalyptic number.

40036400 is a gapful number since it is divisible by the number (40) 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 40036400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48618912).

40036400 is an abundant number, since it is smaller than the sum of its proper divisors (57201424).

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

40036400 is a wasteful number, since it uses less digits than its factorization.

40036400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 40036400 is about 6327.4323386347. The cubic root of 40036400 is about 342.0988964246.

Adding to 40036400 its reverse (463004), we get a palindrome (40499404).

The spelling of 40036400 in words is "forty million, thirty-six thousand, four hundred".