1671220870 has 32 divisors (see below), whose sum is σ = 3474713376. Its totient is φ = 571968000.

The previous prime is 1671220861. The next prime is 1671220897. The reversal of 1671220870 is 780221761.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 444981 + ... + 448720.

It is an arithmetic number, because the mean of its divisors is an integer number (108584793).

Almost surely, 2^1671220870 is an apocalyptic number.

1671220870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1671220870 is an abundant number, since it is smaller than the sum of its proper divisors (1803492506).

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

1671220870 is a wasteful number, since it uses less digits than its factorization.

1671220870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893736.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 1671220870 is about 40880.5683668904. The cubic root of 1671220870 is about 1186.7100403741.

The spelling of 1671220870 in words is "one billion, six hundred seventy-one million, two hundred twenty thousand, eight hundred seventy".