678540626 has 8 divisors (see below), whose sum is σ = 1018862064. Its totient is φ = 338919940.

The previous prime is 678540589. The next prime is 678540631. The reversal of 678540626 is 626045876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×678540626² = 920834762264943752, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172760 + ... + 176643.

It is an arithmetic number, because the mean of its divisors is an integer number (127357758).

Almost surely, 2^678540626 is an apocalyptic number.

678540626 is a deficient number, since it is larger than the sum of its proper divisors (340321438).

678540626 is a wasteful number, since it uses less digits than its factorization.

678540626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350376.

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 678540626 is about 26048.8123721601. The cubic root of 678540626 is about 878.7364035783.

The spelling of 678540626 in words is "six hundred seventy-eight million, five hundred forty thousand, six hundred twenty-six".