40401400402 has 32 divisors (see below), whose sum is σ = 68439168000. Its totient is φ = 17718556800.

The previous prime is 40401400363. The next prime is 40401400409. The reversal of 40401400402 is 20400410404.

It is a self number, because there is not a number n which added to its sum of digits gives 40401400402.

It is not an unprimeable number, because it can be changed into a prime (40401400409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 916974 + ... + 960022.

It is an arithmetic number, because the mean of its divisors is an integer number (2138724000).

Almost surely, 2^40401400402 is an apocalyptic number.

40401400402 is a deficient number, since it is larger than the sum of its proper divisors (28037767598).

40401400402 is a wasteful number, since it uses less digits than its factorization.

40401400402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44562.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 40401400402 its reverse (20400410404), we get a palindrome (60801810806).

The spelling of 40401400402 in words is "forty billion, four hundred one million, four hundred thousand, four hundred two".