1890085620 has 24 divisors (see below), whose sum is σ = 5292239904. Its totient is φ = 504022816.

The previous prime is 1890085607. The next prime is 1890085649. The reversal of 1890085620 is 265800981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15750654 + ... + 15750773.

It is an arithmetic number, because the mean of its divisors is an integer number (220509996).

Almost surely, 2^1890085620 is an apocalyptic number.

1890085620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1890085620 is an abundant number, since it is smaller than the sum of its proper divisors (3402154284).

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

1890085620 is a wasteful number, since it uses less digits than its factorization.

1890085620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31501439 (or 31501437 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 1890085620 is about 43475.1149509694. The cubic root of 1890085620 is about 1236.4042597372.

The spelling of 1890085620 in words is "one billion, eight hundred ninety million, eighty-five thousand, six hundred twenty".