343815990 has 128 divisors (see below), whose sum is σ = 1005696000. Its totient is φ = 73433088.

The previous prime is 343815961. The next prime is 343816021. The reversal of 343815990 is 99518343.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 688761 + ... + 689259.

It is an arithmetic number, because the mean of its divisors is an integer number (7857000).

Almost surely, 2^343815990 is an apocalyptic number.

343815990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 343815990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (502848000).

343815990 is an abundant number, since it is smaller than the sum of its proper divisors (661880010).

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

343815990 is a wasteful number, since it uses less digits than its factorization.

343815990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 343815990 is about 18542.2757502956. The cubic root of 343815990 is about 700.5546556322.

The spelling of 343815990 in words is "three hundred forty-three million, eight hundred fifteen thousand, nine hundred ninety".