1670738400 has 720 divisors, whose sum is σ = 6805814400. Its totient is φ = 396887040.

The previous prime is 1670738389. The next prime is 1670738411. The reversal of 1670738400 is 48370761.

It is an interprime number because it is at equal distance from previous prime (1670738389) and next prime (1670738411).

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 28317571 + ... + 28317629.

It is an arithmetic number, because the mean of its divisors is an integer number (9452520).

Almost surely, 2^1670738400 is an apocalyptic number.

1670738400 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 1670738400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3402907200).

1670738400 is an abundant number, since it is smaller than the sum of its proper divisors (5135076000).

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

1670738400 is a wasteful number, since it uses less digits than its factorization.

1670738400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 1670738400 is about 40874.6669711204. Note that the first 3 decimals coincide. The cubic root of 1670738400 is about 1186.5958310338.

The spelling of 1670738400 in words is "one billion, six hundred seventy million, seven hundred thirty-eight thousand, four hundred".