78406022 has 16 divisors (see below), whose sum is σ = 121195872. Its totient is φ = 38018880.

The previous prime is 78406021. The next prime is 78406049. The reversal of 78406022 is 22060487.

It is a super-2 number, since 2×78406022² = 12295008571728968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78406021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11423 + ... + 16949.

It is an arithmetic number, because the mean of its divisors is an integer number (7574742).

Almost surely, 2^78406022 is an apocalyptic number.

78406022 is a deficient number, since it is larger than the sum of its proper divisors (42789850).

78406022 is a wasteful number, since it uses less digits than its factorization.

78406022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5743.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 78406022 is about 8854.7174997286. The cubic root of 78406022 is about 428.0059502186.

The spelling of 78406022 in words is "seventy-eight million, four hundred six thousand, twenty-two".