82457740 has 24 divisors (see below), whose sum is σ = 176847552. Its totient is φ = 32280960.

The previous prime is 82457707. The next prime is 82457743. The reversal of 82457740 is 4775428.

It is a self number, because there is not a number n which added to its sum of digits gives 82457740.

It is not an unprimeable number, because it can be changed into a prime (82457743) 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, 42921 + ... + 44800.

It is an arithmetic number, because the mean of its divisors is an integer number (7368648).

Almost surely, 2^82457740 is an apocalyptic number.

It is an amenable number.

82457740 is an abundant number, since it is smaller than the sum of its proper divisors (94389812).

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

82457740 is a wasteful number, since it uses less digits than its factorization.

82457740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87777 (or 87775 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 82457740 is about 9080.6244278684. The cubic root of 82457740 is about 435.2550404701.

It can be divided in two parts, 824 and 57740, that added together give a square (58564 = 242²).

The spelling of 82457740 in words is "eighty-two million, four hundred fifty-seven thousand, seven hundred forty".