1897468740 has 120 divisors (see below), whose sum is σ = 6091081920. Its totient is φ = 494206272.

The previous prime is 1897468723. The next prime is 1897468747. The reversal of 1897468740 is 478647981.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1897468747) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 56041 + ... + 83279.

It is an arithmetic number, because the mean of its divisors is an integer number (50759016).

Almost surely, 2^1897468740 is an apocalyptic number.

1897468740 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 1897468740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3045540960).

1897468740 is an abundant number, since it is smaller than the sum of its proper divisors (4193613180).

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

1897468740 is a wasteful number, since it uses less digits than its factorization.

1897468740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27303 (or 27292 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The square root of 1897468740 is about 43559.9442148403. The cubic root of 1897468740 is about 1238.0120635667.

The spelling of 1897468740 in words is "one billion, eight hundred ninety-seven million, four hundred sixty-eight thousand, seven hundred forty".