1684955890 has 16 divisors (see below), whose sum is σ = 3033411840. Its totient is φ = 673873200.

The previous prime is 1684955837. The next prime is 1684955897. The reversal of 1684955890 is 985594861.

It is not an unprimeable number, because it can be changed into a prime (1684955897) 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, 85465 + ... + 103315.

It is an arithmetic number, because the mean of its divisors is an integer number (189588240).

Almost surely, 2^1684955890 is an apocalyptic number.

1684955890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1684955890 is a deficient number, since it is larger than the sum of its proper divisors (1348455950).

1684955890 is a wasteful number, since it uses less digits than its factorization.

1684955890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27297.

The product of its (nonzero) digits is 3110400, while the sum is 55.

The square root of 1684955890 is about 41048.2142120702. The cubic root of 1684955890 is about 1189.9521883669.

The spelling of 1684955890 in words is "one billion, six hundred eighty-four million, nine hundred fifty-five thousand, eight hundred ninety".