1620702345 has 16 divisors (see below), whose sum is σ = 2593958400. Its totient is φ = 864096384.

The previous prime is 1620702341. The next prime is 1620702401. The reversal of 1620702345 is 5432070261.

It is not a de Polignac number, because 1620702345 - 2² = 1620702341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1620702341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36072 + ... + 67398.

It is an arithmetic number, because the mean of its divisors is an integer number (162122400).

Almost surely, 2^1620702345 is an apocalyptic number.

1620702345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1620702345 is a deficient number, since it is larger than the sum of its proper divisors (973256055).

1620702345 is a wasteful number, since it uses less digits than its factorization.

1620702345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34784.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 1620702345 is about 40257.9476004428. The cubic root of 1620702345 is about 1174.6299954649.

The spelling of 1620702345 in words is "one billion, six hundred twenty million, seven hundred two thousand, three hundred forty-five".