42400303440 has 80 divisors (see below), whose sum is σ = 143390126016. Its totient is φ = 10278860800.

The previous prime is 42400303433. The next prime is 42400303453. The reversal of 42400303440 is 4430300424.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 42400303440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8027721 + ... + 8033000.

Almost surely, 2^42400303440 is an apocalyptic number.

42400303440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42400303440 is an abundant number, since it is smaller than the sum of its proper divisors (100989822576).

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

42400303440 is a wasteful number, since it uses less digits than its factorization.

42400303440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16060748 (or 16060742 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 42400303440 its reverse (4430300424), we get a palindrome (46830603864).

The spelling of 42400303440 in words is "forty-two billion, four hundred million, three hundred three thousand, four hundred forty".