7278198 has 8 divisors (see below), whose sum is σ = 14556408. Its totient is φ = 2426064.

The previous prime is 7278157. The next prime is 7278199. The reversal of 7278198 is 8918727.

It is a sphenic number, since it is the product of 3 distinct primes.

7278198 is an admirable number.

It is a super-2 number, since 2×7278198² = 105944332254408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7278199) 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, 606511 + ... + 606522.

It is an arithmetic number, because the mean of its divisors is an integer number (1819551).

Almost surely, 2^7278198 is an apocalyptic number.

7278198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7278198 is a wasteful number, since it uses less digits than its factorization.

7278198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213038.

The product of its digits is 56448, while the sum is 42.

The square root of 7278198 is about 2697.8135591623. The cubic root of 7278198 is about 193.7944292145.

The spelling of 7278198 in words is "seven million, two hundred seventy-eight thousand, one hundred ninety-eight".