400245102 has 24 divisors (see below), whose sum is σ = 870662520. Its totient is φ = 132882000.

The previous prime is 400245077. The next prime is 400245107. The reversal of 400245102 is 201542004.

It is a super-2 number, since 2×400245102² = 320392283349980808, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400245107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39777 + ... + 48812.

It is an arithmetic number, because the mean of its divisors is an integer number (36277605).

Almost surely, 2^400245102 is an apocalyptic number.

400245102 is an abundant number, since it is smaller than the sum of its proper divisors (470417418).

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

400245102 is a wasteful number, since it uses less digits than its factorization.

400245102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88848 (or 88845 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 400245102 is about 20006.1266116158. The cubic root of 400245102 is about 736.9567629146.

Adding to 400245102 its reverse (201542004), we get a palindrome (601787106).

The spelling of 400245102 in words is "four hundred million, two hundred forty-five thousand, one hundred two".