678513770 has 64 divisors (see below), whose sum is σ = 1400547456. Its totient is φ = 234420480.

The previous prime is 678513767. The next prime is 678513779. The reversal of 678513770 is 77315876.

It is a super-2 number, since 2×678513770² = 920761872159225800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678513779) 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 31 ways as a sum of consecutive naturals, for example, 173072 + ... + 176948.

It is an arithmetic number, because the mean of its divisors is an integer number (21883554).

Almost surely, 2^678513770 is an apocalyptic number.

678513770 is an abundant number, since it is smaller than the sum of its proper divisors (722033686).

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

678513770 is a wasteful number, since it uses less digits than its factorization.

678513770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975.

The product of its (nonzero) digits is 246960, while the sum is 44.

The square root of 678513770 is about 26048.2968733082. The cubic root of 678513770 is about 878.7248102385.

The spelling of 678513770 in words is "six hundred seventy-eight million, five hundred thirteen thousand, seven hundred seventy".