78722276 has 12 divisors (see below), whose sum is σ = 137826108. Its totient is φ = 39343392.

The previous prime is 78722249. The next prime is 78722279. The reversal of 78722276 is 67222787.

It can be written as a sum of positive squares in 2 ways, for example, as 40653376 + 38068900 = 6376^2 + 6170^2 .

It is not an unprimeable number, because it can be changed into a prime (78722279) 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, 15170 + ... + 19686.

It is an arithmetic number, because the mean of its divisors is an integer number (11485509).

Almost surely, 2^78722276 is an apocalyptic number.

It is an amenable number.

78722276 is a deficient number, since it is larger than the sum of its proper divisors (59103832).

78722276 is a wasteful number, since it uses less digits than its factorization.

78722276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8878 (or 8876 counting only the distinct ones).

The product of its digits is 131712, while the sum is 41.

The square root of 78722276 is about 8872.5574667060. The cubic root of 78722276 is about 428.5806382571.

The spelling of 78722276 in words is "seventy-eight million, seven hundred twenty-two thousand, two hundred seventy-six".