1671399360 has 140 divisors (see below), whose sum is σ = 5945553768. Its totient is φ = 445699584.

The previous prime is 1671399341. The next prime is 1671399403. The reversal of 1671399360 is 639931761.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6322 + ... + 58161.

Almost surely, 2^1671399360 is an apocalyptic number.

1671399360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1671399360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2972776884).

1671399360 is an abundant number, since it is smaller than the sum of its proper divisors (4274154408).

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

1671399360 is an equidigital number, since it uses as much as digits as its factorization.

1671399360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64512 (or 64493 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 1671399360 is about 40882.7513751215. The cubic root of 1671399360 is about 1186.7522866023.

The spelling of 1671399360 in words is "one billion, six hundred seventy-one million, three hundred ninety-nine thousand, three hundred sixty".