1620347070 has 64 divisors (see below), whose sum is σ = 3998801664. Its totient is φ = 419973120.

The previous prime is 1620347041. The next prime is 1620347167. The reversal of 1620347070 is 707430261.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 269214 + ... + 275166.

It is an arithmetic number, because the mean of its divisors is an integer number (62481276).

Almost surely, 2^1620347070 is an apocalyptic number.

1620347070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620347070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1999400832).

1620347070 is an abundant number, since it is smaller than the sum of its proper divisors (2378454594).

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

1620347070 is a wasteful number, since it uses less digits than its factorization.

1620347070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6217.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 1620347070 is about 40253.5348758342. The cubic root of 1620347070 is about 1174.5441587761.

The spelling of 1620347070 in words is "one billion, six hundred twenty million, three hundred forty-seven thousand, seventy".