1887386961 has 16 divisors (see below), whose sum is σ = 2619892800. Its totient is φ = 1207123008.

The previous prime is 1887386959. The next prime is 1887386987. The reversal of 1887386961 is 1696837881.

It is not a de Polignac number, because 1887386961 - 2¹ = 1887386959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1887386911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55431 + ... + 82748.

It is an arithmetic number, because the mean of its divisors is an integer number (163743300).

Almost surely, 2^1887386961 is an apocalyptic number.

It is an amenable number.

1887386961 is a deficient number, since it is larger than the sum of its proper divisors (732505839).

1887386961 is a wasteful number, since it uses less digits than its factorization.

1887386961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138368.

The product of its digits is 3483648, while the sum is 57.

The square root of 1887386961 is about 43444.0670402761. The cubic root of 1887386961 is about 1235.8155345986.

The spelling of 1887386961 in words is "one billion, eight hundred eighty-seven million, three hundred eighty-six thousand, nine hundred sixty-one".