400072212 has 36 divisors (see below), whose sum is σ = 1055265120. Its totient is φ = 127558992.

The previous prime is 400072199. The next prime is 400072223. The reversal of 400072212 is 212270004.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240762 + ... + 242417.

It is an arithmetic number, because the mean of its divisors is an integer number (29312920).

Almost surely, 2^400072212 is an apocalyptic number.

It is an amenable number.

400072212 is an abundant number, since it is smaller than the sum of its proper divisors (655192908).

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

400072212 is a wasteful number, since it uses less digits than its factorization.

400072212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483212 (or 483207 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 400072212 is about 20001.8052185297. The cubic root of 400072212 is about 736.8506356073.

The spelling of 400072212 in words is "four hundred million, seventy-two thousand, two hundred twelve".