687078038 has 16 divisors (see below), whose sum is σ = 1092150000. Its totient is φ = 323271072.

The previous prime is 687078031. The next prime is 687078059. The reversal of 687078038 is 830870786.

It is a junction number, because it is equal to n+sod(n) for n = 687077983 and 687078001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687078031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55013 + ... + 66336.

It is an arithmetic number, because the mean of its divisors is an integer number (68259375).

Almost surely, 2^687078038 is an apocalyptic number.

687078038 is a deficient number, since it is larger than the sum of its proper divisors (405071962).

687078038 is a wasteful number, since it uses less digits than its factorization.

687078038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121519.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 687078038 is about 26212.1734695923. The cubic root of 687078038 is about 882.4064804719.

The spelling of 687078038 in words is "six hundred eighty-seven million, seventy-eight thousand, thirty-eight".