1903723540 has 12 divisors (see below), whose sum is σ = 3997819476. Its totient is φ = 761489408.

The previous prime is 1903723537. The next prime is 1903723561. The reversal of 1903723540 is 453273091.

It can be written as a sum of positive squares in 2 ways, for example, as 501670404 + 1402053136 = 22398^2 + 37444^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1903723496 and 1903723505.

It is a congruent number.

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, 47593069 + ... + 47593108.

It is an arithmetic number, because the mean of its divisors is an integer number (333151623).

Almost surely, 2^1903723540 is an apocalyptic number.

1903723540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1903723540 is an abundant number, since it is smaller than the sum of its proper divisors (2094095936).

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

1903723540 is a wasteful number, since it uses less digits than its factorization.

1903723540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95186186 (or 95186184 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 1903723540 is about 43631.6804627097. The cubic root of 1903723540 is about 1239.3708957632.

The spelling of 1903723540 in words is "one billion, nine hundred three million, seven hundred twenty-three thousand, five hundred forty".