1987102426 has 8 divisors (see below), whose sum is σ = 3155986260. Its totient is φ = 935107008.

The previous prime is 1987102423. The next prime is 1987102463. The reversal of 1987102426 is 6242017891.

It can be written as a sum of positive squares in 2 ways, for example, as 1982475625 + 4626801 = 44525^2 + 2151^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1987102423) 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 3 ways as a sum of consecutive naturals, for example, 29222061 + ... + 29222128.

Almost surely, 2^1987102426 is an apocalyptic number.

1987102426 is a deficient number, since it is larger than the sum of its proper divisors (1168883834).

1987102426 is a wasteful number, since it uses less digits than its factorization.

1987102426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58444208.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 1987102426 is about 44576.9270587375. The cubic root of 1987102426 is about 1257.2068863234.

The spelling of 1987102426 in words is "one billion, nine hundred eighty-seven million, one hundred two thousand, four hundred twenty-six".