78122469 has 16 divisors (see below), whose sum is σ = 106527168. Its totient is φ = 50911872.

The previous prime is 78122461. The next prime is 78122479. The reversal of 78122469 is 96422187.

It is not a de Polignac number, because 78122469 - 2³ = 78122461 is a prime.

It is a super-2 number, since 2×78122469² = 12206240325311922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78122461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26119 + ... + 28955.

It is an arithmetic number, because the mean of its divisors is an integer number (6657948).

Almost surely, 2^78122469 is an apocalyptic number.

It is an amenable number.

78122469 is a deficient number, since it is larger than the sum of its proper divisors (28404699).

78122469 is a wasteful number, since it uses less digits than its factorization.

78122469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044.

The product of its digits is 48384, while the sum is 39.

The square root of 78122469 is about 8838.6915886912. The cubic root of 78122469 is about 427.4893701403.

The spelling of 78122469 in words is "seventy-eight million, one hundred twenty-two thousand, four hundred sixty-nine".