400212332 has 24 divisors (see below), whose sum is σ = 770298816. Its totient is φ = 180782208.

The previous prime is 400212289. The next prime is 400212343. The reversal of 400212332 is 233212004.

It is a self number, because there is not a number n which added to its sum of digits gives 400212332.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79433 + ... + 84320.

It is an arithmetic number, because the mean of its divisors is an integer number (32095784).

Almost surely, 2^400212332 is an apocalyptic number.

It is an amenable number.

400212332 is a deficient number, since it is larger than the sum of its proper divisors (370086484).

400212332 is a wasteful number, since it uses less digits than its factorization.

400212332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163817 (or 163815 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 400212332 is about 20005.3075957357. The cubic root of 400212332 is about 736.9366496289.

Adding to 400212332 its reverse (233212004), we get a palindrome (633424336).

The spelling of 400212332 in words is "four hundred million, two hundred twelve thousand, three hundred thirty-two".