678140136 has 48 divisors (see below), whose sum is σ = 1850062500. Its totient is φ = 224393472.

The previous prime is 678140131. The next prime is 678140137. The reversal of 678140136 is 631041876.

It can be written as a sum of positive squares in 2 ways, for example, as 649944036 + 28196100 = 25494^2 + 5310^2 .

It is a super-3 number, since 3×678140136³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 678140136.

It is not an unprimeable number, because it can be changed into a prime (678140131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24511 + ... + 44238.

Almost surely, 2^678140136 is an apocalyptic number.

It is an amenable number.

678140136 is an abundant number, since it is smaller than the sum of its proper divisors (1171922364).

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

678140136 is a wasteful number, since it uses less digits than its factorization.

678140136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68898 (or 68891 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 678140136 is about 26041.1239388779. The cubic root of 678140136 is about 878.5634861977.

The spelling of 678140136 in words is "six hundred seventy-eight million, one hundred forty thousand, one hundred thirty-six".