400237222 has 32 divisors (see below), whose sum is σ = 792529920. Its totient is φ = 146762880.

The previous prime is 400237219. The next prime is 400237241. The reversal of 400237222 is 222732004.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 400237193 and 400237202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73822 + ... + 79057.

It is an arithmetic number, because the mean of its divisors is an integer number (24766560).

Almost surely, 2^400237222 is an apocalyptic number.

400237222 is a deficient number, since it is larger than the sum of its proper divisors (392292698).

400237222 is a wasteful number, since it uses less digits than its factorization.

400237222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152916.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 400237222 is about 20005.9296709751. The cubic root of 400237222 is about 736.9519264970.

Adding to 400237222 its reverse (222732004), we get a palindrome (622969226).

The spelling of 400237222 in words is "four hundred million, two hundred thirty-seven thousand, two hundred twenty-two".