82640452 has 12 divisors (see below), whose sum is σ = 144684540. Its totient is φ = 41302016.

The previous prime is 82640431. The next prime is 82640473. The reversal of 82640452 is 25404628.

It is an interprime number because it is at equal distance from previous prime (82640431) and next prime (82640473).

It can be written as a sum of positive squares in 2 ways, for example, as 43877376 + 38763076 = 6624^2 + 6226^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14748 + ... + 19564.

It is an arithmetic number, because the mean of its divisors is an integer number (12057045).

Almost surely, 2^82640452 is an apocalyptic number.

It is an amenable number.

82640452 is a deficient number, since it is larger than the sum of its proper divisors (62044088).

82640452 is a wasteful number, since it uses less digits than its factorization.

82640452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9110 (or 9108 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 82640452 is about 9090.6794025529. The cubic root of 82640452 is about 435.5762864494.

The spelling of 82640452 in words is "eighty-two million, six hundred forty thousand, four hundred fifty-two".