78937240 has 16 divisors (see below), whose sum is σ = 177608880. Its totient is φ = 31574880.

The previous prime is 78937237. The next prime is 78937277. The reversal of 78937240 is 4273987.

It is a super-3 number, since 3×78937240³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1973431 = 78937240 / (7 + 8 + 9 + 3 + 7 + 2 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 78937193 and 78937202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 986676 + ... + 986755.

It is an arithmetic number, because the mean of its divisors is an integer number (11100555).

Almost surely, 2^78937240 is an apocalyptic number.

It is an amenable number.

78937240 is an abundant number, since it is smaller than the sum of its proper divisors (98671640).

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

78937240 is a wasteful number, since it uses less digits than its factorization.

78937240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973442 (or 1973438 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 78937240 is about 8884.6631900146. The cubic root of 78937240 is about 428.9703868004.

The spelling of 78937240 in words is "seventy-eight million, nine hundred thirty-seven thousand, two hundred forty".