1061985870 has 64 divisors (see below), whose sum is σ = 3089422080. Its totient is φ = 257450400.

The previous prime is 1061985839. The next prime is 1061985871. The reversal of 1061985870 is 785891601.

1061985870 is a `hidden beast` number, since 1 + 0 + 61 + 9 + 8 + 587 + 0 = 666.

It is a super-2 number, since 2×1061985870² = 2255627976159313800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061985871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175816 + ... + 181755.

It is an arithmetic number, because the mean of its divisors is an integer number (48272220).

Almost surely, 2^1061985870 is an apocalyptic number.

1061985870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1061985870 is an abundant number, since it is smaller than the sum of its proper divisors (2027436210).

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

1061985870 is a wasteful number, since it uses less digits than its factorization.

1061985870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357598 (or 357592 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 1061985870 is about 32588.1246775570. The cubic root of 1061985870 is about 1020.2491605846.

The spelling of 1061985870 in words is "one billion, sixty-one million, nine hundred eighty-five thousand, eight hundred seventy".