1620346346 has 4 divisors (see below), whose sum is σ = 2430519522. Its totient is φ = 810173172.

The previous prime is 1620346337. The next prime is 1620346393. The reversal of 1620346346 is 6436430261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1591132321 + 29214025 = 39889^2 + 5405^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 405086585 + ... + 405086588.

Almost surely, 2^1620346346 is an apocalyptic number.

1620346346 is a deficient number, since it is larger than the sum of its proper divisors (810173176).

1620346346 is an equidigital number, since it uses as much as digits as its factorization.

1620346346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810173175.

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 1620346346 is about 40253.5258828342. The cubic root of 1620346346 is about 1174.5439838403.

The spelling of 1620346346 in words is "one billion, six hundred twenty million, three hundred forty-six thousand, three hundred forty-six".