78264745 has 24 divisors (see below), whose sum is σ = 106145856. Its totient is φ = 55268928.

The previous prime is 78264737. The next prime is 78264757. The reversal of 78264745 is 54746287.

It is not a de Polignac number, because 78264745 - 2³ = 78264737 is a prime.

It is a super-2 number, since 2×78264745² = 12250740619830050, which contains 22 as substring.

It is a Duffinian 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 23 ways as a sum of consecutive naturals, for example, 17422 + ... + 21448.

It is an arithmetic number, because the mean of its divisors is an integer number (4422744).

Almost surely, 2^78264745 is an apocalyptic number.

It is an amenable number.

78264745 is a deficient number, since it is larger than the sum of its proper divisors (27881111).

78264745 is a wasteful number, since it uses less digits than its factorization.

78264745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081 (or 4068 counting only the distinct ones).

The product of its digits is 376320, while the sum is 43.

The square root of 78264745 is about 8846.7364038949. The cubic root of 78264745 is about 427.7487261369.

The spelling of 78264745 in words is "seventy-eight million, two hundred sixty-four thousand, seven hundred forty-five".