1087261538 has 16 divisors (see below), whose sum is σ = 1781193024. Its totient is φ = 493643760.

The previous prime is 1087261531. The next prime is 1087261541. The reversal of 1087261538 is 8351627801.

It is a junction number, because it is equal to n+sod(n) for n = 1087261495 and 1087261504.

It is not an unprimeable number, because it can be changed into a prime (1087261531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8345 + ... + 47372.

It is an arithmetic number, because the mean of its divisors is an integer number (111324564).

Almost surely, 2^1087261538 is an apocalyptic number.

1087261538 is a deficient number, since it is larger than the sum of its proper divisors (693931486).

1087261538 is a wasteful number, since it uses less digits than its factorization.

1087261538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56617.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 1087261538 is about 32973.6491459468. The cubic root of 1087261538 is about 1028.2798882854.

The spelling of 1087261538 in words is "one billion, eighty-seven million, two hundred sixty-one thousand, five hundred thirty-eight".