4040400402 has 24 divisors (see below), whose sum is σ = 8940462336. Its totient is φ = 1318144536.

The previous prime is 4040400389. The next prime is 4040400451. The reversal of 4040400402 is 2040040404.

It is a happy number.

4040400402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2387098 + ... + 2388789.

It is an arithmetic number, because the mean of its divisors is an integer number (372519264).

Almost surely, 2^4040400402 is an apocalyptic number.

4040400402 is an abundant number, since it is smaller than the sum of its proper divisors (4900061934).

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

4040400402 is a wasteful number, since it uses less digits than its factorization.

4040400402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4775942 (or 4775939 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 4040400402 is about 63564.1439964387. The cubic root of 4040400402 is about 1592.7274629724.

Adding to 4040400402 its reverse (2040040404), we get a palindrome (6080440806).

The spelling of 4040400402 in words is "four billion, forty million, four hundred thousand, four hundred two".