87787812 has 72 divisors (see below), whose sum is σ = 239936256. Its totient is φ = 24908352.

The previous prime is 87787801. The next prime is 87787823. The reversal of 87787812 is 21878778.

It is an interprime number because it is at equal distance from previous prime (87787801) and next prime (87787823).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101293 + ... + 102155.

It is an arithmetic number, because the mean of its divisors is an integer number (3332448).

Almost surely, 2^87787812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87787812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119968128).

87787812 is an abundant number, since it is smaller than the sum of its proper divisors (152148444).

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

87787812 is a wasteful number, since it uses less digits than its factorization.

87787812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057 (or 1048 counting only the distinct ones).

The product of its digits is 351232, while the sum is 48.

The square root of 87787812 is about 9369.5150354754. The cubic root of 87787812 is about 444.4382289594.

The spelling of 87787812 in words is "eighty-seven million, seven hundred eighty-seven thousand, eight hundred twelve".