82420940788 has 48 divisors (see below), whose sum is σ = 152631864000. Its totient is φ = 38835134208.

The previous prime is 82420940747. The next prime is 82420940813. The reversal of 82420940788 is 88704902428.

It is a happy number.

It is a super-2 number, since 2×82420940788² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34441320 + ... + 34443712.

It is an arithmetic number, because the mean of its divisors is an integer number (3179830500).

Almost surely, 2^82420940788 is an apocalyptic number.

It is an amenable number.

82420940788 is a deficient number, since it is larger than the sum of its proper divisors (70210923212).

82420940788 is a wasteful number, since it uses less digits than its factorization.

82420940788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4624 (or 4622 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 52.

The spelling of 82420940788 in words is "eighty-two billion, four hundred twenty million, nine hundred forty thousand, seven hundred eighty-eight".