677705238 has 128 divisors (see below), whose sum is σ = 1833891840. Its totient is φ = 181094400.

The previous prime is 677705233. The next prime is 677705257. The reversal of 677705238 is 832507776.

It is a super-2 number, since 2×677705238² = 918568779225273288, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 677705193 and 677705202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677705233) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1689838 + ... + 1690238.

It is an arithmetic number, because the mean of its divisors is an integer number (14327280).

Almost surely, 2^677705238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 677705238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (916945920).

677705238 is an abundant number, since it is smaller than the sum of its proper divisors (1156186602).

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

677705238 is a wasteful number, since it uses less digits than its factorization.

677705238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The square root of 677705238 is about 26032.7723840547. The cubic root of 677705238 is about 878.3756355406.

The spelling of 677705238 in words is "six hundred seventy-seven million, seven hundred five thousand, two hundred thirty-eight".