400346430 has 64 divisors (see below), whose sum is σ = 1109852928. Its totient is φ = 91343360.

The previous prime is 400346407. The next prime is 400346437. The reversal of 400346430 is 34643004.

It is a self number, because there is not a number n which added to its sum of digits gives 400346430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400346437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30072 + ... + 41291.

It is an arithmetic number, because the mean of its divisors is an integer number (17341452).

Almost surely, 2^400346430 is an apocalyptic number.

400346430 is an abundant number, since it is smaller than the sum of its proper divisors (709506498).

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

400346430 is a wasteful number, since it uses less digits than its factorization.

400346430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71401.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 400346430 is about 20008.6588755968. The cubic root of 400346430 is about 737.0189481887.

Adding to 400346430 its reverse (34643004), we get a palindrome (434989434).

It can be divided in two parts, 40034 and 6430, that added together give a palindrome (46464).

The spelling of 400346430 in words is "four hundred million, three hundred forty-six thousand, four hundred thirty".