787139136 has 189 divisors, whose sum is σ = 2640360099. Its totient is φ = 223550208.

The previous prime is 787139131. The next prime is 787139149. The reversal of 787139136 is 631931787.

The square root of 787139136 is 28056.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 787139091 and 787139100.

It is not an unprimeable number, because it can be changed into a prime (787139131) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4713325 + ... + 4713491.

Almost surely, 2^787139136 is an apocalyptic number.

787139136 is the 28056-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 787139136

787139136 is an abundant number, since it is smaller than the sum of its proper divisors (1853220963).

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

787139136 is a wasteful number, since it uses less digits than its factorization.

787139136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 179 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The cubic root of 787139136 is about 923.3162986369.

The spelling of 787139136 in words is "seven hundred eighty-seven million, one hundred thirty-nine thousand, one hundred thirty-six".