1853980491 has 32 divisors (see below), whose sum is σ = 2728558080. Its totient is φ = 1110412800.

The previous prime is 1853980487. The next prime is 1853980493. The reversal of 1853980491 is 1940893581.

It is not a de Polignac number, because 1853980491 - 2² = 1853980487 is a prime.

It is a super-2 number, since 2×1853980491² = 6874487322017202162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1853980491.

It is not an unprimeable number, because it can be changed into a prime (1853980493) 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, 2016930 + ... + 2017848.

It is an arithmetic number, because the mean of its divisors is an integer number (85267440).

Almost surely, 2^1853980491 is an apocalyptic number.

1853980491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1853980491 is a deficient number, since it is larger than the sum of its proper divisors (874577589).

1853980491 is a wasteful number, since it uses less digits than its factorization.

1853980491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 1853980491 is about 43057.8737398864. The cubic root of 1853980491 is about 1228.4808378006.

The spelling of 1853980491 in words is "one billion, eight hundred fifty-three million, nine hundred eighty thousand, four hundred ninety-one".