40043100 has 72 divisors (see below), whose sum is σ = 116881408. Its totient is φ = 10584000.

The previous prime is 40043063. The next prime is 40043111. The reversal of 40043100 is 134004.

It is a super-2 number, since 2×40043100² = 3206899715220000, 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 23 ways as a sum of consecutive naturals, for example, 37575 + ... + 38625.

Almost surely, 2^40043100 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 40043100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58440704).

40043100 is an abundant number, since it is smaller than the sum of its proper divisors (76838308).

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

40043100 is a wasteful number, since it uses less digits than its factorization.

40043100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195 (or 1188 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 40043100 is about 6327.9617571537. The cubic root of 40043100 is about 342.1179785163.

Adding to 40043100 its reverse (134004), we get a palindrome (40177104).

The spelling of 40043100 in words is "forty million, forty-three thousand, one hundred".