1881616320 has 84 divisors (see below), whose sum is σ = 6471986040. Its totient is φ = 501763584.

The previous prime is 1881616313. The next prime is 1881616327. The reversal of 1881616320 is 236161881.

1881616320 is a `hidden beast` number, since 1 + 8 + 8 + 1 + 616 + 32 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1881616313) and next prime (1881616327).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881616327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 323790 + ... + 329549.

Almost surely, 2^1881616320 is an apocalyptic number.

1881616320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1881616320 is an abundant number, since it is smaller than the sum of its proper divisors (4590369720).

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

1881616320 is a wasteful number, since it uses less digits than its factorization.

1881616320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653362 (or 653349 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1881616320 is about 43377.6015934491. The cubic root of 1881616320 is about 1234.5547565338.

It can be divided in two parts, 188161 and 6320, that added together give a 4-th power (194481 = 21⁴).

The spelling of 1881616320 in words is "one billion, eight hundred eighty-one million, six hundred sixteen thousand, three hundred twenty".