1990860340 has 24 divisors (see below), whose sum is σ = 4778065152. Its totient is φ = 682580640.

The previous prime is 1990860239. The next prime is 1990860367. The reversal of 1990860340 is 430680991.

It is a junction number, because it is equal to n+sod(n) for n = 1990860293 and 1990860302.

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, 7110076 + ... + 7110355.

It is an arithmetic number, because the mean of its divisors is an integer number (199086048).

Almost surely, 2^1990860340 is an apocalyptic number.

1990860340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1990860340 is an abundant number, since it is smaller than the sum of its proper divisors (2787204812).

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

1990860340 is a wasteful number, since it uses less digits than its factorization.

1990860340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14220447 (or 14220445 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 1990860340 is about 44619.0580357766. The cubic root of 1990860340 is about 1257.9989106276.

The spelling of 1990860340 in words is "one billion, nine hundred ninety million, eight hundred sixty thousand, three hundred forty".