402240004440 has 32 divisors (see below), whose sum is σ = 1206720013680. Its totient is φ = 107264001152.

The previous prime is 402240004423. The next prime is 402240004447. The reversal of 402240004440 is 44400042204.

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 402240004440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402240004447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1675999899 + ... + 1676000138.

Almost surely, 2^402240004440 is an apocalyptic number.

402240004440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402240004440 is an abundant number, since it is smaller than the sum of its proper divisors (804480009240).

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

402240004440 is a wasteful number, since it uses less digits than its factorization.

402240004440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352000051 (or 3352000047 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 402240004440 its reverse (44400042204), we get a palindrome (446640046644).

The spelling of 402240004440 in words is "four hundred two billion, two hundred forty million, four thousand, four hundred forty".