78245536 has 12 divisors (see below), whose sum is σ = 154045962. Its totient is φ = 39122752.

The previous prime is 78245533. The next prime is 78245539. The reversal of 78245536 is 63554287.

It is an interprime number because it is at equal distance from previous prime (78245533) and next prime (78245539).

It can be written as a sum of positive squares in only one way, i.e., 42771600 + 35473936 = 6540^2 + 5956^2 .

It is a super-2 number, since 2×78245536² = 12244727807854592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78245533) 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 as a sum of consecutive naturals, namely, 1222555 + ... + 1222618.

Almost surely, 2^78245536 is an apocalyptic number.

It is an amenable number.

78245536 is a deficient number, since it is larger than the sum of its proper divisors (75800426).

78245536 is a wasteful number, since it uses less digits than its factorization.

78245536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445183 (or 2445175 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 78245536 is about 8845.6506826802. The cubic root of 78245536 is about 427.7137282691.

The spelling of 78245536 in words is "seventy-eight million, two hundred forty-five thousand, five hundred thirty-six".