1987404625 has 32 divisors (see below), whose sum is σ = 2523830400. Its totient is φ = 1562270400.

The previous prime is 1987404623. The next prime is 1987404641. The reversal of 1987404625 is 5264047891.

It is not a de Polignac number, because 1987404625 - 2¹ = 1987404623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1987404623) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1858591 + ... + 1859659.

It is an arithmetic number, because the mean of its divisors is an integer number (78869700).

Almost surely, 2^1987404625 is an apocalyptic number.

It is an amenable number.

1987404625 is a deficient number, since it is larger than the sum of its proper divisors (536425775).

1987404625 is a wasteful number, since it uses less digits than its factorization.

1987404625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330 (or 1320 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 1987404625 is about 44580.3165646006. The cubic root of 1987404625 is about 1257.2706151982.

The spelling of 1987404625 in words is "one billion, nine hundred eighty-seven million, four hundred four thousand, six hundred twenty-five".