785138530 has 16 divisors (see below), whose sum is σ = 1541726784. Its totient is φ = 285504880.

The previous prime is 785138527. The next prime is 785138533. The reversal of 785138530 is 35831587.

It is an interprime number because it is at equal distance from previous prime (785138527) and next prime (785138533).

It is a super-2 number, since 2×785138530² = 1232885022581121800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (785138533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3568702 + ... + 3568921.

It is an arithmetic number, because the mean of its divisors is an integer number (96357924).

Almost surely, 2^785138530 is an apocalyptic number.

785138530 is a deficient number, since it is larger than the sum of its proper divisors (756588254).

785138530 is a wasteful number, since it uses less digits than its factorization.

785138530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7137641.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 785138530 is about 28020.3235170474. The cubic root of 785138530 is about 922.5333962641.

The spelling of 785138530 in words is "seven hundred eighty-five million, one hundred thirty-eight thousand, five hundred thirty".