40505400 has 192 divisors, whose sum is σ = 150511200. Its totient is φ = 9953280.

The previous prime is 40505393. The next prime is 40505401. The reversal of 40505400 is 450504.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40505401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69912 + ... + 70488.

Almost surely, 2^40505400 is an apocalyptic number.

40505400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40505400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75255600).

40505400 is an abundant number, since it is smaller than the sum of its proper divisors (110005800).

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

40505400 is a wasteful number, since it uses less digits than its factorization.

40505400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 40505400 is about 6364.3852806064. The cubic root of 40505400 is about 343.4295349443.

Adding to 40505400 its reverse (450504), we get a palindrome (40955904).

The spelling of 40505400 in words is "forty million, five hundred five thousand, four hundred".