40781100 has 36 divisors (see below), whose sum is σ = 117994184. Its totient is φ = 10874880.

The previous prime is 40781053. The next prime is 40781107. The reversal of 40781100 is 118704.

It is not an unprimeable number, because it can be changed into a prime (40781107) 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, 67669 + ... + 68268.

Almost surely, 2^40781100 is an apocalyptic number.

It is an amenable number.

40781100 is an abundant number, since it is smaller than the sum of its proper divisors (77213084).

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

40781100 is a wasteful number, since it uses less digits than its factorization.

40781100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135954 (or 135947 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 40781100 is about 6386.0081428072. The cubic root of 40781100 is about 344.2069581217.

Adding to 40781100 its reverse (118704), we get a palindrome (40899804).

The spelling of 40781100 in words is "forty million, seven hundred eighty-one thousand, one hundred".