78226770 has 32 divisors (see below), whose sum is σ = 192326400. Its totient is φ = 20351360.

The previous prime is 78226723. The next prime is 78226777. The reversal of 78226770 is 7762287.

It is a super-2 number, since 2×78226770² = 12238855089265800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78226777) 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, 30570 + ... + 33029.

It is an arithmetic number, because the mean of its divisors is an integer number (6010200).

Almost surely, 2^78226770 is an apocalyptic number.

78226770 is an abundant number, since it is smaller than the sum of its proper divisors (114099630).

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

78226770 is a wasteful number, since it uses less digits than its factorization.

78226770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63650.

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 78226770 is about 8844.5898717804. The cubic root of 78226770 is about 427.6795319941.

The spelling of 78226770 in words is "seventy-eight million, two hundred twenty-six thousand, seven hundred seventy".