78941240 has 32 divisors (see below), whose sum is σ = 202992480. Its totient is φ = 27065472.

The previous prime is 78941227. The next prime is 78941263. The reversal of 78941240 is 4214987.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 78941240.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 140687 + ... + 141246.

It is an arithmetic number, because the mean of its divisors is an integer number (6343515).

Almost surely, 2^78941240 is an apocalyptic number.

78941240 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78941240 is an abundant number, since it is smaller than the sum of its proper divisors (124051240).

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

78941240 is a wasteful number, since it uses less digits than its factorization.

78941240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281951 (or 281947 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 78941240 is about 8884.8882941768. Note that the first 3 decimals coincide. The cubic root of 78941240 is about 428.9776324408.

The spelling of 78941240 in words is "seventy-eight million, nine hundred forty-one thousand, two hundred forty".