78198351 has 32 divisors (see below), whose sum is σ = 137645568. Its totient is φ = 38231040.

The previous prime is 78198349. The next prime is 78198359. The reversal of 78198351 is 15389187.

It is not a de Polignac number, because 78198351 - 2¹ = 78198349 is a prime.

It is a super-2 number, since 2×78198351² = 12229964198238402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78198359) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6030 + ... + 13883.

It is an arithmetic number, because the mean of its divisors is an integer number (4301424).

Almost surely, 2^78198351 is an apocalyptic number.

78198351 is a deficient number, since it is larger than the sum of its proper divisors (59447217).

78198351 is a wasteful number, since it uses less digits than its factorization.

78198351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19951.

The product of its digits is 60480, while the sum is 42.

The square root of 78198351 is about 8842.9831504985. The cubic root of 78198351 is about 427.6277351614.

The spelling of 78198351 in words is "seventy-eight million, one hundred ninety-eight thousand, three hundred fifty-one".