400342446 has 96 divisors (see below), whose sum is σ = 1049967360. Its totient is φ = 112719600.

The previous prime is 400342441. The next prime is 400342493. The reversal of 400342446 is 644243004.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400342441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 186801 + ... + 188931.

It is an arithmetic number, because the mean of its divisors is an integer number (10937160).

Almost surely, 2^400342446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400342446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (524983680).

400342446 is an abundant number, since it is smaller than the sum of its proper divisors (649624914).

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

400342446 is a wasteful number, since it uses less digits than its factorization.

400342446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227 (or 2214 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 400342446 is about 20008.5593184517. The cubic root of 400342446 is about 737.0165033951.

The spelling of 400342446 in words is "four hundred million, three hundred forty-two thousand, four hundred forty-six".