1987402536 has 48 divisors (see below), whose sum is σ = 6151485600. Its totient is φ = 567829152.

The previous prime is 1987402531. The next prime is 1987402541. The reversal of 1987402536 is 6352047891.

1987402536 is a `hidden beast` number, since 198 + 7 + 402 + 53 + 6 = 666.

1987402536 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1987402531) and next prime (1987402541).

1987402536 is strictly pandigital in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 1987402491 and 1987402500.

It is not an unprimeable number, because it can be changed into a prime (1987402531) 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 11 ways as a sum of consecutive naturals, for example, 1971126 + ... + 1972133.

It is an arithmetic number, because the mean of its divisors is an integer number (128155950).

It is a 1-persistent number, because it is pandigital, but 2⋅1987402536 = 3974805072 is not.

Almost surely, 2^1987402536 is an apocalyptic number.

It is an amenable number.

1987402536 is an abundant number, since it is smaller than the sum of its proper divisors (4164083064).

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

1987402536 is a wasteful number, since it uses less digits than its factorization.

1987402536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3943278 (or 3943271 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 1987402536 is about 44580.2931349716. The cubic root of 1987402536 is about 1257.2701746841.

The spelling of 1987402536 in words is "one billion, nine hundred eighty-seven million, four hundred two thousand, five hundred thirty-six".