400243100 has 18 divisors (see below), whose sum is σ = 868527744. Its totient is φ = 160097200.

The previous prime is 400243099. The next prime is 400243147. The reversal of 400243100 is 1342004.

It is a super-2 number, since 2×400243100² = 320389078195220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2001116 + ... + 2001315.

Almost surely, 2^400243100 is an apocalyptic number.

It is an amenable number.

400243100 is an abundant number, since it is smaller than the sum of its proper divisors (468284644).

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

400243100 is a wasteful number, since it uses less digits than its factorization.

400243100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002445 (or 4002438 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 400243100 is about 20006.0765768803. The cubic root of 400243100 is about 736.9555341760.

Adding to 400243100 its reverse (1342004), we get a palindrome (401585104).

The spelling of 400243100 in words is "four hundred million, two hundred forty-three thousand, one hundred".