348428621 has 4 divisors (see below), whose sum is σ = 348471552. Its totient is φ = 348385692.

The previous prime is 348428611. The next prime is 348428627. The reversal of 348428621 is 126824843.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 126824843 = 2389 ⋅53087.

It is a cyclic number.

It is not a de Polignac number, because 348428621 - 2⁶ = 348428557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (348428627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5165 + ... + 26898.

It is an arithmetic number, because the mean of its divisors is an integer number (87117888).

Almost surely, 2^348428621 is an apocalyptic number.

It is an amenable number.

348428621 is a deficient number, since it is larger than the sum of its proper divisors (42931).

348428621 is a wasteful number, since it uses less digits than its factorization.

348428621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42930.

The product of its digits is 73728, while the sum is 38.

The square root of 348428621 is about 18666.2428195928. The cubic root of 348428621 is about 703.6736263997.

The spelling of 348428621 in words is "three hundred forty-eight million, four hundred twenty-eight thousand, six hundred twenty-one".