1985279020 has 24 divisors (see below), whose sum is σ = 4178732544. Its totient is φ = 792274176.

The previous prime is 1985279003. The next prime is 1985279039. The reversal of 1985279020 is 209725891.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 105964 + ... + 123283.

It is an arithmetic number, because the mean of its divisors is an integer number (174113856).

Almost surely, 2^1985279020 is an apocalyptic number.

1985279020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1985279020 is an abundant number, since it is smaller than the sum of its proper divisors (2193453524).

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

1985279020 is a wasteful number, since it uses less digits than its factorization.

1985279020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229689 (or 229687 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 1985279020 is about 44556.4700127827. The cubic root of 1985279020 is about 1256.8222223538.

The spelling of 1985279020 in words is "one billion, nine hundred eighty-five million, two hundred seventy-nine thousand, twenty".