400102442 has 8 divisors (see below), whose sum is σ = 600241536. Its totient is φ = 200021932.

The previous prime is 400102403. The next prime is 400102447. The reversal of 400102442 is 244201004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×400102442³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400102442.

It is not an unprimeable number, because it can be changed into a prime (400102447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12473 + ... + 30915.

It is an arithmetic number, because the mean of its divisors is an integer number (75030192).

Almost surely, 2^400102442 is an apocalyptic number.

400102442 is a deficient number, since it is larger than the sum of its proper divisors (200139094).

400102442 is a wasteful number, since it uses less digits than its factorization.

400102442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29292.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 400102442 is about 20002.5608860466. The cubic root of 400102442 is about 736.8691942850.

Adding to 400102442 its reverse (244201004), we get a palindrome (644303446).

The spelling of 400102442 in words is "four hundred million, one hundred two thousand, four hundred forty-two".