1860000981 has 8 divisors (see below), whose sum is σ = 2480228544. Its totient is φ = 1239887040.

The previous prime is 1860000973. The next prime is 1860001001. The reversal of 1860000981 is 1890000681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1860000981 - 2³ = 1860000973 is a prime.

It is a super-2 number, since 2×1860000981² = 6919207298641924722, which contains 22 as substring.

1860000981 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1860000911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23176 + ... + 65246.

It is an arithmetic number, because the mean of its divisors is an integer number (310028568).

Almost surely, 2^1860000981 is an apocalyptic number.

It is an amenable number.

1860000981 is a deficient number, since it is larger than the sum of its proper divisors (620227563).

1860000981 is a wasteful number, since it uses less digits than its factorization.

1860000981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56811.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 1860000981 is about 43127.7286788906. The cubic root of 1860000981 is about 1229.8091626724.

The spelling of 1860000981 in words is "one billion, eight hundred sixty million, nine hundred eighty-one", and thus it is an aban number.