78487465 has 24 divisors (see below), whose sum is σ = 109958472. Its totient is φ = 53625600.

The previous prime is 78487463. The next prime is 78487481. The reversal of 78487465 is 56478487.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 34821801 + 43665664 = 5901^2 + 6608^2 .

It is not a de Polignac number, because 78487465 - 2¹ = 78487463 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78487463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111615 + ... + 112315.

It is an arithmetic number, because the mean of its divisors is an integer number (4581603).

Almost surely, 2^78487465 is an apocalyptic number.

It is an amenable number.

78487465 is a deficient number, since it is larger than the sum of its proper divisors (31471007).

78487465 is a wasteful number, since it uses less digits than its factorization.

78487465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177 (or 1170 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 49.

The square root of 78487465 is about 8859.3151541189. The cubic root of 78487465 is about 428.1540937126.

The spelling of 78487465 in words is "seventy-eight million, four hundred eighty-seven thousand, four hundred sixty-five".