1985979300 has 36 divisors (see below), whose sum is σ = 5746100976. Its totient is φ = 529594400.

The previous prime is 1985979293. The next prime is 1985979301. The reversal of 1985979300 is 39795891.

It is a happy number.

It is a super-2 number, since 2×1985979300² = 7888227560056980000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1985979301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3309666 + ... + 3310265.

It is an arithmetic number, because the mean of its divisors is an integer number (159613916).

Almost surely, 2^1985979300 is an apocalyptic number.

1985979300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1985979300 is an abundant number, since it is smaller than the sum of its proper divisors (3760121676).

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

1985979300 is a wasteful number, since it uses less digits than its factorization.

1985979300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6619948 (or 6619941 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 51.

The square root of 1985979300 is about 44564.3276623804. The cubic root of 1985979300 is about 1256.9699805938.

The spelling of 1985979300 in words is "one billion, nine hundred eighty-five million, nine hundred seventy-nine thousand, three hundred".