400420446 has 8 divisors (see below), whose sum is σ = 800840904. Its totient is φ = 133473480.

The previous prime is 400420439. The next prime is 400420453. The reversal of 400420446 is 644024004.

It is an interprime number because it is at equal distance from previous prime (400420439) and next prime (400420453).

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

400420446 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33368365 + ... + 33368376.

It is an arithmetic number, because the mean of its divisors is an integer number (100105113).

Almost surely, 2^400420446 is an apocalyptic number.

400420446 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.

400420446 is a wasteful number, since it uses less digits than its factorization.

400420446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66736746.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 400420446 is about 20010.5083893438. The cubic root of 400420446 is about 737.0643653815.

The spelling of 400420446 in words is "four hundred million, four hundred twenty thousand, four hundred forty-six".