40043400 has 48 divisors (see below), whose sum is σ = 124136400. Its totient is φ = 10678080.

The previous prime is 40043383. The next prime is 40043401. The reversal of 40043400 is 434004.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 40043400.

It is not an unprimeable number, because it can be changed into a prime (40043401) 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, 32770 + ... + 33969.

It is an arithmetic number, because the mean of its divisors is an integer number (2586175).

Almost surely, 2^40043400 is an apocalyptic number.

40043400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40043400 is an abundant number, since it is smaller than the sum of its proper divisors (84093000).

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

40043400 is a wasteful number, since it uses less digits than its factorization.

40043400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66758 (or 66749 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 40043400 is about 6327.9854614245. The cubic root of 40043400 is about 342.1188328885.

Adding to 40043400 its reverse (434004), we get a palindrome (40477404).

The spelling of 40043400 in words is "forty million, forty-three thousand, four hundred".