78106040 has 32 divisors (see below), whose sum is σ = 176770080. Its totient is φ = 31059072.

The previous prime is 78106037. The next prime is 78106043. The reversal of 78106040 is 4060187.

It is an interprime number because it is at equal distance from previous prime (78106037) and next prime (78106043).

It is a super-2 number, since 2×78106040² = 12201106968963200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78106043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1277 + ... + 12563.

It is an arithmetic number, because the mean of its divisors is an integer number (5524065).

Almost surely, 2^78106040 is an apocalyptic number.

It is an amenable number.

78106040 is an abundant number, since it is smaller than the sum of its proper divisors (98664040).

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

78106040 is a wasteful number, since it uses less digits than its factorization.

78106040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11471 (or 11467 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 78106040 is about 8837.7621601851. The cubic root of 78106040 is about 427.4594013177.

The spelling of 78106040 in words is "seventy-eight million, one hundred six thousand, forty".