78273198 has 24 divisors (see below), whose sum is σ = 178518600. Its totient is φ = 24717744.

The previous prime is 78273197. The next prime is 78273199. The reversal of 78273198 is 89137287.

It is an interprime number because it is at equal distance from previous prime (78273197) and next prime (78273199).

It is a super-2 number, since 2×78273198² = 12253387050294408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78273197) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114093 + ... + 114776.

It is an arithmetic number, because the mean of its divisors is an integer number (7438275).

Almost surely, 2^78273198 is an apocalyptic number.

78273198 is an abundant number, since it is smaller than the sum of its proper divisors (100245402).

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

78273198 is a wasteful number, since it uses less digits than its factorization.

78273198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228896 (or 228893 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 78273198 is about 8847.2141377950. The cubic root of 78273198 is about 427.7641252791.

It can be divided in two parts, 7827 and 3198, that added together give a square (11025 = 105²).

The spelling of 78273198 in words is "seventy-eight million, two hundred seventy-three thousand, one hundred ninety-eight".