1620100104 has 32 divisors (see below), whose sum is σ = 4628857920. Its totient is φ = 462885696.

The previous prime is 1620100103. The next prime is 1620100127. The reversal of 1620100104 is 4010010261.

It is not an unprimeable number, because it can be changed into a prime (1620100103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4821559 + ... + 4821894.

It is an arithmetic number, because the mean of its divisors is an integer number (144651810).

Almost surely, 2^1620100104 is an apocalyptic number.

1620100104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1620100104 is an abundant number, since it is smaller than the sum of its proper divisors (3008757816).

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

1620100104 is a wasteful number, since it uses less digits than its factorization.

1620100104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9643469 (or 9643465 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1620100104 is about 40250.4671277241. The cubic root of 1620100104 is about 1174.4844828345.

Adding to 1620100104 its reverse (4010010261), we get a palindrome (5630110365).

The spelling of 1620100104 in words is "one billion, six hundred twenty million, one hundred thousand, one hundred four".