981045870 has 32 divisors (see below), whose sum is σ = 2690869248. Its totient is φ = 224239008.

The previous prime is 981045869. The next prime is 981045881. The reversal of 981045870 is 78540189.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2335614 + ... + 2336033.

It is an arithmetic number, because the mean of its divisors is an integer number (84089664).

Almost surely, 2^981045870 is an apocalyptic number.

981045870 is an abundant number, since it is smaller than the sum of its proper divisors (1709823378).

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

981045870 is a wasteful number, since it uses less digits than its factorization.

981045870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671664.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 981045870 is about 31321.6517763671. The cubic root of 981045870 is about 993.6416132728.

The spelling of 981045870 in words is "nine hundred eighty-one million, forty-five thousand, eight hundred seventy".