1642950820 has 48 divisors (see below), whose sum is σ = 4007743488. Its totient is φ = 554060160.

The previous prime is 1642950809. The next prime is 1642950821. The reversal of 1642950820 is 280592461.

It is a self number, because there is not a number n which added to its sum of digits gives 1642950820.

It is not an unprimeable number, because it can be changed into a prime (1642950821) 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, 87652 + ... + 104731.

It is an arithmetic number, because the mean of its divisors is an integer number (83494656).

Almost surely, 2^1642950820 is an apocalyptic number.

1642950820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642950820 is an abundant number, since it is smaller than the sum of its proper divisors (2364792668).

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

1642950820 is a wasteful number, since it uses less digits than its factorization.

1642950820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192460 (or 192458 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1642950820 is about 40533.3297423244. The cubic root of 1642950820 is about 1179.9805656093.

The spelling of 1642950820 in words is "one billion, six hundred forty-two million, nine hundred fifty thousand, eight hundred twenty".