1985237136 has 135 divisors (see below), whose sum is σ = 5749398291. Its totient is φ = 639467712.

The previous prime is 1985237129. The next prime is 1985237143. The reversal of 1985237136 is 6317325891.

The square root of 1985237136 is 44556.

It is a perfect power (a square), and thus also a powerful number.

1985237136 is a `hidden beast` number, since 1 + 98 + 523 + 7 + 1 + 36 = 666.

It is an interprime number because it is at equal distance from previous prime (1985237129) and next prime (1985237143).

It is a junction number, because it is equal to n+sod(n) for n = 1985237091 and 1985237100.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 25129545 + ... + 25129623.

Almost surely, 2^1985237136 is an apocalyptic number.

1985237136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1985237136 is the 44556-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1985237136

1985237136 is an abundant number, since it is smaller than the sum of its proper divisors (3764161155).

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

1985237136 is an equidigital number, since it uses as much as digits as its factorization.

1985237136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 131 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The cubic root of 1985237136 is about 1256.8133837788.

It can be divided in two parts, 1985 and 237136, that added together give a square (239121 = 489²).

The spelling of 1985237136 in words is "one billion, nine hundred eighty-five million, two hundred thirty-seven thousand, one hundred thirty-six".