1612808820 has 120 divisors (see below), whose sum is σ = 5782258944. Its totient is φ = 368639424.

The previous prime is 1612808809. The next prime is 1612808851. The reversal of 1612808820 is 288082161.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 59772 + ... + 82451.

Almost surely, 2^1612808820 is an apocalyptic number.

1612808820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1612808820 is an abundant number, since it is smaller than the sum of its proper divisors (4169450124).

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

1612808820 is a wasteful number, since it uses less digits than its factorization.

1612808820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142251 (or 142240 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 1612808820 is about 40159.7910851140. The cubic root of 1612808820 is about 1172.7199048655.

The spelling of 1612808820 in words is "one billion, six hundred twelve million, eight hundred eight thousand, eight hundred twenty".