678952890 has 96 divisors (see below), whose sum is σ = 2200887936. Its totient is φ = 141079680.

The previous prime is 678952871. The next prime is 678952891. The reversal of 678952890 is 98259876.

It is a happy number.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (678952891) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42057 + ... + 55916.

It is an arithmetic number, because the mean of its divisors is an integer number (22925916).

Almost surely, 2^678952890 is an apocalyptic number.

678952890 is an abundant number, since it is smaller than the sum of its proper divisors (1521935046).

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

678952890 is a wasteful number, since it uses less digits than its factorization.

678952890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98004 (or 98001 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The square root of 678952890 is about 26056.7244679756. The cubic root of 678952890 is about 878.9143334996.

The spelling of 678952890 in words is "six hundred seventy-eight million, nine hundred fifty-two thousand, eight hundred ninety".