1897454480 has 20 divisors (see below), whose sum is σ = 4411581852. Its totient is φ = 758981760.

The previous prime is 1897454459. The next prime is 1897454497. The reversal of 1897454480 is 844547981.

It can be written as a sum of positive squares in 2 ways, for example, as 569872384 + 1327582096 = 23872^2 + 36436^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11859011 + ... + 11859170.

Almost surely, 2^1897454480 is an apocalyptic number.

1897454480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1897454480 is an abundant number, since it is smaller than the sum of its proper divisors (2514127372).

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

1897454480 is a wasteful number, since it uses less digits than its factorization.

1897454480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23718194 (or 23718188 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 50.

The square root of 1897454480 is about 43559.7805320458. The cubic root of 1897454480 is about 1238.0089622251.

The spelling of 1897454480 in words is "one billion, eight hundred ninety-seven million, four hundred fifty-four thousand, four hundred eighty".