346921620 has 144 divisors (see below), whose sum is σ = 1044524544. Its totient is φ = 85881600.

The previous prime is 346921609. The next prime is 346921633. The reversal of 346921620 is 26129643.

It is a super-2 number, since 2×346921620² = 240709220846848800, which contains 22 as substring.

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, 4886185 + ... + 4886255.

Almost surely, 2^346921620 is an apocalyptic number.

346921620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 346921620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522262272).

346921620 is an abundant number, since it is smaller than the sum of its proper divisors (697602924).

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

346921620 is a wasteful number, since it uses less digits than its factorization.

346921620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 346921620 is about 18625.8320619510. The cubic root of 346921620 is about 702.6576656708.

The spelling of 346921620 in words is "three hundred forty-six million, nine hundred twenty-one thousand, six hundred twenty".