78089655 has 16 divisors (see below), whose sum is σ = 142792704. Its totient is φ = 35698080.

The previous prime is 78089629. The next prime is 78089659. The reversal of 78089655 is 55698087.

It is not a de Polignac number, because 78089655 - 2⁸ = 78089399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78089659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371751 + ... + 371960.

It is an arithmetic number, because the mean of its divisors is an integer number (8924544).

Almost surely, 2^78089655 is an apocalyptic number.

78089655 is a deficient number, since it is larger than the sum of its proper divisors (64703049).

78089655 is a wasteful number, since it uses less digits than its factorization.

78089655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743726.

The product of its (nonzero) digits is 604800, while the sum is 48.

The square root of 78089655 is about 8836.8351235043. The cubic root of 78089655 is about 427.4295085714.

The spelling of 78089655 in words is "seventy-eight million, eighty-nine thousand, six hundred fifty-five".