406212078 has 8 divisors (see below), whose sum is σ = 812424168. Its totient is φ = 135404024.

The previous prime is 406212073. The next prime is 406212097. The reversal of 406212078 is 870212604.

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

406212078 is an admirable number.

It is a super-4 number, since 4×406212078⁴ (a number of 36 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406212073) 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, 33851001 + ... + 33851012.

It is an arithmetic number, because the mean of its divisors is an integer number (101553021).

Almost surely, 2^406212078 is an apocalyptic number.

406212078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

406212078 is a wasteful number, since it uses less digits than its factorization.

406212078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67702018.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 406212078 is about 20154.7036197509. The cubic root of 406212078 is about 740.6009715076.

The spelling of 406212078 in words is "four hundred six million, two hundred twelve thousand, seventy-eight".