78108975 has 96 divisors (see below), whose sum is σ = 167290880. Its totient is φ = 34992000.

The previous prime is 78108973. The next prime is 78108983. The reversal of 78108975 is 57980187.

It is not a de Polignac number, because 78108975 - 2¹ = 78108973 is a prime.

It is a super-2 number, since 2×78108975² = 12202023951101250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 78108975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78108973) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 288090 + ... + 288360.

Almost surely, 2^78108975 is an apocalyptic number.

78108975 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78108975 is an abundant number, since it is smaller than the sum of its proper divisors (89181905).

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

78108975 is a wasteful number, since it uses less digits than its factorization.

78108975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 78108975 is about 8837.9282074477. The cubic root of 78108975 is about 427.4647554816.

The spelling of 78108975 in words is "seventy-eight million, one hundred eight thousand, nine hundred seventy-five".