1897025490 has 48 divisors (see below), whose sum is σ = 4934749248. Its totient is φ = 505618848.

The previous prime is 1897025443. The next prime is 1897025497. The reversal of 1897025490 is 945207981.

1897025490 is a `hidden beast` number, since 18 + 97 + 0 + 2 + 549 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1897025497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234249 + ... + 242211.

It is an arithmetic number, because the mean of its divisors is an integer number (102807276).

Almost surely, 2^1897025490 is an apocalyptic number.

1897025490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1897025490 is an abundant number, since it is smaller than the sum of its proper divisors (3037723758).

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

1897025490 is a wasteful number, since it uses less digits than its factorization.

1897025490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10623 (or 10620 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 1897025490 is about 43554.8561012432. The cubic root of 1897025490 is about 1237.9156559035.

The spelling of 1897025490 in words is "one billion, eight hundred ninety-seven million, twenty-five thousand, four hundred ninety".