40004004400 has 60 divisors (see below), whose sum is σ = 97007945112. Its totient is φ = 15852037120.

The previous prime is 40004004371. The next prime is 40004004401. The reversal of 40004004400 is 440040004.

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

It is not an unprimeable number, because it can be changed into a prime (40004004401) 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, 424537 + ... + 510136.

Almost surely, 2^40004004400 is an apocalyptic number.

40004004400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40004004400 is an abundant number, since it is smaller than the sum of its proper divisors (57003940712).

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

40004004400 is a wasteful number, since it uses less digits than its factorization.

40004004400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934798 (or 934787 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 40004004400 its reverse (440040004), we get a palindrome (40444044404).

The spelling of 40004004400 in words is "forty billion, four million, four thousand, four hundred".