1673977956 has 24 divisors (see below), whose sum is σ = 4463941440. Its totient is φ = 478279392.

The previous prime is 1673977937. The next prime is 1673977969. The reversal of 1673977956 is 6597793761.

It is a self number, because there is not a number n which added to its sum of digits gives 1673977956.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9964071 + ... + 9964238.

It is an arithmetic number, because the mean of its divisors is an integer number (185997560).

Almost surely, 2^1673977956 is an apocalyptic number.

It is an amenable number.

1673977956 is an abundant number, since it is smaller than the sum of its proper divisors (2789963484).

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

1673977956 is a wasteful number, since it uses less digits than its factorization.

1673977956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19928323 (or 19928321 counting only the distinct ones).

The product of its digits is 15002820, while the sum is 60.

The square root of 1673977956 is about 40914.2756993204. The cubic root of 1673977956 is about 1187.3622709480.

The spelling of 1673977956 in words is "one billion, six hundred seventy-three million, nine hundred seventy-seven thousand, nine hundred fifty-six".