677378638 has 8 divisors (see below), whose sum is σ = 1017650088. Its totient is φ = 338161944.

The previous prime is 677378609. The next prime is 677378641. The reversal of 677378638 is 836873776.

It is a happy number.

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

It is a congruent number.

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, 262081 + ... + 264652.

It is an arithmetic number, because the mean of its divisors is an integer number (127206261).

Almost surely, 2^677378638 is an apocalyptic number.

677378638 is a deficient number, since it is larger than the sum of its proper divisors (340271450).

677378638 is a wasteful number, since it uses less digits than its factorization.

677378638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527378.

The product of its digits is 7112448, while the sum is 55.

The square root of 677378638 is about 26026.4987656811. The cubic root of 677378638 is about 878.2345104797.

The spelling of 677378638 in words is "six hundred seventy-seven million, three hundred seventy-eight thousand, six hundred thirty-eight".