400242102 has 64 divisors (see below), whose sum is σ = 879572736. Its totient is φ = 120677760.

The previous prime is 400242097. The next prime is 400242103. The reversal of 400242102 is 201242004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400242103) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1365868 + ... + 1366160.

It is an arithmetic number, because the mean of its divisors is an integer number (13743324).

Almost surely, 2^400242102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400242102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (439786368).

400242102 is an abundant number, since it is smaller than the sum of its proper divisors (479330634).

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

400242102 is a wasteful number, since it uses less digits than its factorization.

400242102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 400242102 is about 20006.0516344430. The cubic root of 400242102 is about 736.9549216464.

Adding to 400242102 its reverse (201242004), we get a palindrome (601484106).

The spelling of 400242102 in words is "four hundred million, two hundred forty-two thousand, one hundred two".