87447762 has 80 divisors (see below), whose sum is σ = 210055032. Its totient is φ = 27095040.

The previous prime is 87447739. The next prime is 87447769. The reversal of 87447762 is 26774478.

It can be written as a sum of positive squares in 4 ways, for example, as 68707521 + 18740241 = 8289^2 + 4329^2 .

It is a super-2 number, since 2×87447762² = 15294222157617288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87447769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 311062 + ... + 311342.

Almost surely, 2^87447762 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87447762, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105027516).

87447762 is an abundant number, since it is smaller than the sum of its proper divisors (122607270).

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

87447762 is a wasteful number, since it uses less digits than its factorization.

87447762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 416 counting only the distinct ones).

The product of its digits is 526848, while the sum is 45.

The square root of 87447762 is about 9351.3508115138. The cubic root of 87447762 is about 443.8636359904.

It can be divided in two parts, 87447 and 762, that added together give a square (88209 = 297²).

The spelling of 87447762 in words is "eighty-seven million, four hundred forty-seven thousand, seven hundred sixty-two".