78996240 has 60 divisors (see below), whose sum is σ = 265298124. Its totient is φ = 21065472.

The previous prime is 78996223. The next prime is 78996257. The reversal of 78996240 is 4269987.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78996223) and next prime (78996257).

It can be written as a sum of positive squares in 2 ways, for example, as 37161216 + 41835024 = 6096^2 + 6468^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54139 + ... + 55578.

Almost surely, 2^78996240 is an apocalyptic number.

It is an amenable number.

78996240 is an abundant number, since it is smaller than the sum of its proper divisors (186301884).

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

78996240 is a wasteful number, since it uses less digits than its factorization.

78996240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109736 (or 109727 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 78996240 is about 8887.9828982734. The cubic root of 78996240 is about 429.0772351853.

The spelling of 78996240 in words is "seventy-eight million, nine hundred ninety-six thousand, two hundred forty".