1677020856 has 64 divisors (see below), whose sum is σ = 4921006080. Its totient is φ = 466197120.

The previous prime is 1677020789. The next prime is 1677020869. The reversal of 1677020856 is 6580207761.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 128680 + ... + 141111.

It is an arithmetic number, because the mean of its divisors is an integer number (76890720).

Almost surely, 2^1677020856 is an apocalyptic number.

It is an amenable number.

1677020856 is an abundant number, since it is smaller than the sum of its proper divisors (3243985224).

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

1677020856 is a wasteful number, since it uses less digits than its factorization.

1677020856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269844 (or 269840 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 1677020856 is about 40951.4451027067. The cubic root of 1677020856 is about 1188.0812843294.

The spelling of 1677020856 in words is "one billion, six hundred seventy-seven million, twenty thousand, eight hundred fifty-six".