40040800 has 36 divisors (see below), whose sum is σ = 97751556. Its totient is φ = 16016000.

The previous prime is 40040789. The next prime is 40040807. The reversal of 40040800 is 804004.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24226 + ... + 25825.

It is an arithmetic number, because the mean of its divisors is an integer number (2715321).

Almost surely, 2^40040800 is an apocalyptic number.

40040800 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40040800 is an abundant number, since it is smaller than the sum of its proper divisors (57710756).

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

40040800 is a wasteful number, since it uses less digits than its factorization.

40040800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50071 (or 50058 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 40040800 is about 6327.7800214609. The cubic root of 40040800 is about 342.1114281875. Note that the first 3 decimals are identical.

Adding to 40040800 its reverse (804004), we get a palindrome (40844804).

The spelling of 40040800 in words is "forty million, forty thousand, eight hundred".