40017900 has 144 divisors (see below), whose sum is σ = 129102848. Its totient is φ = 9504000.

The previous prime is 40017899. The next prime is 40017947. The reversal of 40017900 is 971004.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 120735 + ... + 121065.

Almost surely, 2^40017900 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 40017900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64551424).

40017900 is an abundant number, since it is smaller than the sum of its proper divisors (89084948).

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

40017900 is a wasteful number, since it uses less digits than its factorization.

40017900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 40017900 is about 6325.9702813086. The cubic root of 40017900 is about 342.0461960100.

Adding to 40017900 its reverse (971004), we get a palindrome (40988904).

The spelling of 40017900 in words is "forty million, seventeen thousand, nine hundred".