82640252 has 12 divisors (see below), whose sum is σ = 144738720. Its totient is φ = 41286336.

The previous prime is 82640251. The next prime is 82640263. The reversal of 82640252 is 25204628.

It is a super-2 number, since 2×82640252² = 13658822501247008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82640251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2477 + ... + 13092.

It is an arithmetic number, because the mean of its divisors is an integer number (12061560).

Almost surely, 2^82640252 is an apocalyptic number.

It is an amenable number.

82640252 is a deficient number, since it is larger than the sum of its proper divisors (62098468).

82640252 is a wasteful number, since it uses less digits than its factorization.

82640252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16900 (or 16898 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 82640252 is about 9090.6684022683. The cubic root of 82640252 is about 435.5759350665.

The spelling of 82640252 in words is "eighty-two million, six hundred forty thousand, two hundred fifty-two".