78245472 has 48 divisors (see below), whose sum is σ = 205882992. Its totient is φ = 26019840.

The previous prime is 78245467. The next prime is 78245473. The reversal of 78245472 is 27454287.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×78245472² = 12244707777005568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78245472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78245473) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 58572 + ... + 59892.

It is an arithmetic number, because the mean of its divisors is an integer number (4289229).

Almost surely, 2^78245472 is an apocalyptic number.

It is an amenable number.

78245472 is an abundant number, since it is smaller than the sum of its proper divisors (127637520).

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

78245472 is a wasteful number, since it uses less digits than its factorization.

78245472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951 (or 1943 counting only the distinct ones).

The product of its digits is 125440, while the sum is 39.

The square root of 78245472 is about 8845.6470650824. The cubic root of 78245472 is about 427.7136116546.

The spelling of 78245472 in words is "seventy-eight million, two hundred forty-five thousand, four hundred seventy-two".