1487785820 has 24 divisors (see below), whose sum is σ = 3260192544. Its totient is φ = 569239616.

The previous prime is 1487785801. The next prime is 1487785829. The reversal of 1487785820 is 285877841.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1487785829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1616699 + ... + 1617618.

It is an arithmetic number, because the mean of its divisors is an integer number (135841356).

Almost surely, 2^1487785820 is an apocalyptic number.

1487785820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1487785820 is an abundant number, since it is smaller than the sum of its proper divisors (1772406724).

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

1487785820 is a wasteful number, since it uses less digits than its factorization.

1487785820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234349 (or 3234347 counting only the distinct ones).

The product of its (nonzero) digits is 1003520, while the sum is 50.

The square root of 1487785820 is about 38571.8267651404. The cubic root of 1487785820 is about 1141.5987162096.

The spelling of 1487785820 in words is "one billion, four hundred eighty-seven million, seven hundred eighty-five thousand, eight hundred twenty".