400023212 has 12 divisors (see below), whose sum is σ = 700714056. Its totient is φ = 199819200.

The previous prime is 400023181. The next prime is 400023223. The reversal of 400023212 is 212320004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43373 + ... + 51780.

It is an arithmetic number, because the mean of its divisors is an integer number (58392838).

Almost surely, 2^400023212 is an apocalyptic number.

It is an amenable number.

400023212 is a deficient number, since it is larger than the sum of its proper divisors (300690844).

400023212 is a wasteful number, since it uses less digits than its factorization.

400023212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96208 (or 96206 counting only the distinct ones).

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

The square root of 400023212 is about 20000.5802915815. The cubic root of 400023212 is about 736.8205517423.

Adding to 400023212 its reverse (212320004), we get a palindrome (612343216).

The spelling of 400023212 in words is "four hundred million, twenty-three thousand, two hundred twelve".