678513540 has 48 divisors (see below), whose sum is σ = 1906894080. Its totient is φ = 180264960.

The previous prime is 678513529. The next prime is 678513587. The reversal of 678513540 is 45315876.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4605 + ... + 37124.

It is an arithmetic number, because the mean of its divisors is an integer number (39726960).

Almost surely, 2^678513540 is an apocalyptic number.

678513540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

678513540 is an abundant number, since it is smaller than the sum of its proper divisors (1228380540).

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

678513540 is a wasteful number, since it uses less digits than its factorization.

678513540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42012 (or 42010 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 678513540 is about 26048.2924584319. The cubic root of 678513540 is about 878.7247109495.

The spelling of 678513540 in words is "six hundred seventy-eight million, five hundred thirteen thousand, five hundred forty".