1985219028 has 72 divisors (see below), whose sum is σ = 5688664800. Its totient is φ = 578684736.

The previous prime is 1985219003. The next prime is 1985219029. The reversal of 1985219028 is 8209125891.

1985219028 is a `hidden beast` number, since 19 + 8 + 521 + 90 + 28 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985219029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102738 + ... + 120521.

Almost surely, 2^1985219028 is an apocalyptic number.

1985219028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1985219028 is an abundant number, since it is smaller than the sum of its proper divisors (3703445772).

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

1985219028 is a wasteful number, since it uses less digits than its factorization.

1985219028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223301 (or 223296 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 1985219028 is about 44555.7967945811. The cubic root of 1985219028 is about 1256.8095624980.

The spelling of 1985219028 in words is "one billion, nine hundred eighty-five million, two hundred nineteen thousand, twenty-eight".