1897233660 has 288 divisors, whose sum is σ = 7268631552. Its totient is φ = 390297600.

The previous prime is 1897233647. The next prime is 1897233673. The reversal of 1897233660 is 663327981.

It is an interprime number because it is at equal distance from previous prime (1897233647) and next prime (1897233673).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 490735 + ... + 494585.

It is an arithmetic number, because the mean of its divisors is an integer number (25238304).

Almost surely, 2^1897233660 is an apocalyptic number.

1897233660 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 1897233660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3634315776).

1897233660 is an abundant number, since it is smaller than the sum of its proper divisors (5371397892).

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

1897233660 is a wasteful number, since it uses less digits than its factorization.

1897233660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913 (or 3908 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 1897233660 is about 43557.2457806965. The cubic root of 1897233660 is about 1237.9609351187.

The spelling of 1897233660 in words is "one billion, eight hundred ninety-seven million, two hundred thirty-three thousand, six hundred sixty".