340421004 has 144 divisors (see below), whose sum is σ = 1079559936. Its totient is φ = 87868800.

The previous prime is 340420987. The next prime is 340421017. The reversal of 340421004 is 400124043.

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 47 ways as a sum of consecutive naturals, for example, 628974 + ... + 629514.

It is an arithmetic number, because the mean of its divisors is an integer number (7496944).

Almost surely, 2^340421004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 340421004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (539779968).

340421004 is an abundant number, since it is smaller than the sum of its proper divisors (739138932).

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

340421004 is a wasteful number, since it uses less digits than its factorization.

340421004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 791 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 340421004 is about 18450.5014566000. The cubic root of 340421004 is about 698.2411653691.

Adding to 340421004 its reverse (400124043), we get a palindrome (740545047).

The spelling of 340421004 in words is "three hundred forty million, four hundred twenty-one thousand, four".