1087891542 has 12 divisors (see below), whose sum is σ = 2357098380. Its totient is φ = 362630508.

The previous prime is 1087891517. The next prime is 1087891543. The reversal of 1087891542 is 2451987801.

1087891542 is a `hidden beast` number, since 10 + 8 + 7 + 8 + 91 + 542 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087891543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30219192 + ... + 30219227.

It is an arithmetic number, because the mean of its divisors is an integer number (196424865).

Almost surely, 2^1087891542 is an apocalyptic number.

1087891542 is an abundant number, since it is smaller than the sum of its proper divisors (1269206838).

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

1087891542 is a wasteful number, since it uses less digits than its factorization.

1087891542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60438427 (or 60438424 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1087891542 is about 32983.2009059157. The cubic root of 1087891542 is about 1028.4784591400.

The spelling of 1087891542 in words is "one billion, eighty-seven million, eight hundred ninety-one thousand, five hundred forty-two".