678501090 has 32 divisors (see below), whose sum is σ = 1809336960. Its totient is φ = 180933552.

The previous prime is 678501073. The next prime is 678501097. The reversal of 678501090 is 90105876.

678501090 is a `hidden beast` number, since 67 + 8 + 501 + 0 + 90 = 666.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (678501097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1256214 + ... + 1256753.

It is an arithmetic number, because the mean of its divisors is an integer number (56541780).

Almost surely, 2^678501090 is an apocalyptic number.

678501090 is an abundant number, since it is smaller than the sum of its proper divisors (1130835870).

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

678501090 is a wasteful number, since it uses less digits than its factorization.

678501090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512983 (or 2512977 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 678501090 is about 26048.0534781392. The cubic root of 678501090 is about 878.7193363628.

The spelling of 678501090 in words is "six hundred seventy-eight million, five hundred one thousand, ninety".