78887545 has 16 divisors (see below), whose sum is σ = 104068800. Its totient is φ = 56929600.

The previous prime is 78887537. The next prime is 78887587. The reversal of 78887545 is 54578887.

It is a happy number.

It is not a de Polignac number, because 78887545 - 2³ = 78887537 is a prime.

It is a super-2 number, since 2×78887545² = 12446489512254050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78887492 and 78887501.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1731 + ... + 12679.

It is an arithmetic number, because the mean of its divisors is an integer number (6504300).

Almost surely, 2^78887545 is an apocalyptic number.

It is an amenable number.

78887545 is a deficient number, since it is larger than the sum of its proper divisors (25181255).

78887545 is a wasteful number, since it uses less digits than its factorization.

78887545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11096.

The product of its digits is 2508800, while the sum is 52.

The square root of 78887545 is about 8881.8660764504. The cubic root of 78887545 is about 428.8803483578.

The spelling of 78887545 in words is "seventy-eight million, eight hundred eighty-seven thousand, five hundred forty-five".