40400112 has 40 divisors (see below), whose sum is σ = 105455056. Its totient is φ = 13326336.

The previous prime is 40400093. The next prime is 40400123. The reversal of 40400112 is 21100404.

It is a super-2 number, since 2×40400112² = 3264338099225088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318 + ... + 8994.

Almost surely, 2^40400112 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 40400112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52727528).

40400112 is an abundant number, since it is smaller than the sum of its proper divisors (65054944).

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

40400112 is a wasteful number, since it uses less digits than its factorization.

40400112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8785 (or 8779 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 40400112 is about 6356.1082432570. The cubic root of 40400112 is about 343.1317114092.

Adding to 40400112 its reverse (21100404), we get a palindrome (61500516).

The spelling of 40400112 in words is "forty million, four hundred thousand, one hundred twelve".