1788949540 has 48 divisors (see below), whose sum is σ = 4296120192. Its totient is φ = 612976896.

The previous prime is 1788949537. The next prime is 1788949601. The reversal of 1788949540 is 459498871.

It is a happy number.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318799 + ... + 324361.

It is an arithmetic number, because the mean of its divisors is an integer number (89502504).

Almost surely, 2^1788949540 is an apocalyptic number.

1788949540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1788949540 is an abundant number, since it is smaller than the sum of its proper divisors (2507170652).

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

1788949540 is a wasteful number, since it uses less digits than its factorization.

1788949540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7876 (or 7874 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 55.

The square root of 1788949540 is about 42295.9754586651. The cubic root of 1788949540 is about 1213.9459865035.

The spelling of 1788949540 in words is "one billion, seven hundred eighty-eight million, nine hundred forty-nine thousand, five hundred forty".