400212394 has 8 divisors (see below), whose sum is σ = 600427008. Its totient is φ = 200070060.

The previous prime is 400212391. The next prime is 400212413. The reversal of 400212394 is 493212004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×400212394² = 320339920622422472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400212391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002 + ... + 28309.

It is an arithmetic number, because the mean of its divisors is an integer number (75053376).

Almost surely, 2^400212394 is an apocalyptic number.

400212394 is a deficient number, since it is larger than the sum of its proper divisors (200214614).

400212394 is a wasteful number, since it uses less digits than its factorization.

400212394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36140.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 400212394 is about 20005.3091453244. The cubic root of 400212394 is about 736.9366876838.

Adding to 400212394 its reverse (493212004), we get a palindrome (893424398).

The spelling of 400212394 in words is "four hundred million, two hundred twelve thousand, three hundred ninety-four".