82479780 has 72 divisors (see below), whose sum is σ = 253656312. Its totient is φ = 21689856.

The previous prime is 82479757. The next prime is 82479791. The reversal of 82479780 is 8797428.

It can be written as a sum of positive squares in 4 ways, for example, as 32012964 + 50466816 = 5658^2 + 7104^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 10002 + ... + 16278.

Almost surely, 2^82479780 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 82479780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126828156).

82479780 is an abundant number, since it is smaller than the sum of its proper divisors (171176532).

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

82479780 is a wasteful number, since it uses less digits than its factorization.

82479780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6365 (or 6360 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 82479780 is about 9081.8379197165. The cubic root of 82479780 is about 435.2938165612.

The spelling of 82479780 in words is "eighty-two million, four hundred seventy-nine thousand, seven hundred eighty".