1987506126 has 64 divisors (see below), whose sum is σ = 4577126400. Its totient is φ = 638517600.

The previous prime is 1987506089. The next prime is 1987506149. The reversal of 1987506126 is 6216057891.

1987506126 is a `hidden beast` number, since 19 + 8 + 7 + 506 + 126 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1613931 + ... + 1615161.

It is an arithmetic number, because the mean of its divisors is an integer number (71517600).

Almost surely, 2^1987506126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1987506126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2288563200).

1987506126 is an abundant number, since it is smaller than the sum of its proper divisors (2589620274).

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

1987506126 is a wasteful number, since it uses less digits than its factorization.

1987506126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302 (or 2296 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 1987506126 is about 44581.4549560689. The cubic root of 1987506126 is about 1257.2920186660.

The spelling of 1987506126 in words is "one billion, nine hundred eighty-seven million, five hundred six thousand, one hundred twenty-six".