1897980700 has 216 divisors, whose sum is σ = 5457400704. Its totient is φ = 565488000.

The previous prime is 1897980653. The next prime is 1897980701. The reversal of 1897980700 is 70897981.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897980701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1238935 + ... + 1240465.

It is an arithmetic number, because the mean of its divisors is an integer number (25265744).

Almost surely, 2^1897980700 is an apocalyptic number.

1897980700 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 1897980700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2728700352).

1897980700 is an abundant number, since it is smaller than the sum of its proper divisors (3559420004).

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

1897980700 is a wasteful number, since it uses less digits than its factorization.

1897980700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593 (or 1579 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 1897980700 is about 43565.8203182265. The cubic root of 1897980700 is about 1238.1233970937.

The spelling of 1897980700 in words is "one billion, eight hundred ninety-seven million, nine hundred eighty thousand, seven hundred".