400140003402 has 20 divisors (see below), whose sum is σ = 896610007986. Its totient is φ = 133380001080.

The previous prime is 400140003383. The next prime is 400140003469. The reversal of 400140003402 is 204300041004.

It can be written as a sum of positive squares in only one way, i.e., 371147789961 + 28992213441 = 609219^2 + 170271^2 .

It is a super-2 number, since 2×400140003402² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1234999849 + ... + 1235000172.

Almost surely, 2^400140003402 is an apocalyptic number.

400140003402 is an abundant number, since it is smaller than the sum of its proper divisors (496470004584).

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

400140003402 is a wasteful number, since it uses less digits than its factorization.

400140003402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470000035 (or 2470000026 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 400140003402 its reverse (204300041004), we get a palindrome (604440044406).

The spelling of 400140003402 in words is "four hundred billion, one hundred forty million, three thousand, four hundred two".