13402042440 has 64 divisors (see below), whose sum is σ = 40237084800. Its totient is φ = 3571126272.

The previous prime is 13402042391. The next prime is 13402042469. The reversal of 13402042440 is 4424020431.

It is a happy number.

It is a super-2 number, since 2×13402042440² (a number of 21 digits) contains 22 as substring.

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 13402042440.

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, 115944 + ... + 200616.

It is an arithmetic number, because the mean of its divisors is an integer number (628704450).

Almost surely, 2^13402042440 is an apocalyptic number.

13402042440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13402042440 is an abundant number, since it is smaller than the sum of its proper divisors (26835042360).

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

13402042440 is a wasteful number, since it uses less digits than its factorization.

13402042440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86006 (or 86002 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 13402042440 its reverse (4424020431), we get a palindrome (17826062871).

The spelling of 13402042440 in words is "thirteen billion, four hundred two million, forty-two thousand, four hundred forty".