10400340402 has 12 divisors (see below), whose sum is σ = 22534070910. Its totient is φ = 3466780128.

The previous prime is 10400340371. The next prime is 10400340409. The reversal of 10400340402 is 20404300401.

It can be written as a sum of positive squares in only one way, i.e., 5399163441 + 5001176961 = 73479^2 + 70719^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 577796689 = 10400340402 / (1 + 0 + 4 + 0 + 0 + 3 + 4 + 0 + 4 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (10400340409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 288898327 + ... + 288898362.

Almost surely, 2^10400340402 is an apocalyptic number.

10400340402 is an abundant number, since it is smaller than the sum of its proper divisors (12133730508).

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

10400340402 is a wasteful number, since it uses less digits than its factorization.

10400340402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577796697 (or 577796694 counting only the distinct ones).

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

Adding to 10400340402 its reverse (20404300401), we get a palindrome (30804640803).

The spelling of 10400340402 in words is "ten billion, four hundred million, three hundred forty thousand, four hundred two".