1900519540 has 24 divisors (see below), whose sum is σ = 4016518632. Its totient is φ = 755364480.

The previous prime is 1900519529. The next prime is 1900519583. The reversal of 1900519540 is 459150091.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 120692196 + 1779827344 = 10986^2 + 42188^2 .

It is a super-2 number, since 2×1900519540² = 7223949043843623200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1900519496 and 1900519505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299491 + ... + 305770.

It is an arithmetic number, because the mean of its divisors is an integer number (167354943).

Almost surely, 2^1900519540 is an apocalyptic number.

1900519540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1900519540 is an abundant number, since it is smaller than the sum of its proper divisors (2115999092).

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

1900519540 is a wasteful number, since it uses less digits than its factorization.

1900519540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605427 (or 605425 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 1900519540 is about 43594.9485605844. The cubic root of 1900519540 is about 1238.6752110389.

The spelling of 1900519540 in words is "one billion, nine hundred million, five hundred nineteen thousand, five hundred forty".