82121376 has 24 divisors (see below), whose sum is σ = 215568864. Its totient is φ = 27373760.

The previous prime is 82121371. The next prime is 82121381. The reversal of 82121376 is 67312128.

It is an interprime number because it is at equal distance from previous prime (82121371) and next prime (82121381).

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×82121376² = 13487840792266752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82121371) 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, 427620 + ... + 427811.

It is an arithmetic number, because the mean of its divisors is an integer number (8982036).

Almost surely, 2^82121376 is an apocalyptic number.

It is an amenable number.

82121376 is an abundant number, since it is smaller than the sum of its proper divisors (133447488).

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

82121376 is a wasteful number, since it uses less digits than its factorization.

82121376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855444 (or 855436 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 82121376 is about 9062.0845284074. The cubic root of 82121376 is about 434.6623989109.

The spelling of 82121376 in words is "eighty-two million, one hundred twenty-one thousand, three hundred seventy-six".