120400002 has 24 divisors (see below), whose sum is σ = 265290480. Its totient is φ = 39452760.

The previous prime is 120399997. The next prime is 120400019. The reversal of 120400002 is 200004021.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55624 + ... + 57747.

It is an arithmetic number, because the mean of its divisors is an integer number (11053770).

Almost surely, 2^120400002 is an apocalyptic number.

120400002 is an abundant number, since it is smaller than the sum of its proper divisors (144890478).

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

120400002 is a wasteful number, since it uses less digits than its factorization.

120400002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113438 (or 113435 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 120400002 is about 10972.6934706115. The cubic root of 120400002 is about 493.7898569118.

Adding to 120400002 its reverse (200004021), we get a palindrome (320404023).

The spelling of 120400002 in words is "one hundred twenty million, four hundred thousand, two".