71378615 has 32 divisors (see below), whose sum is σ = 107288064. Its totient is φ = 44288640.

The previous prime is 71378603. The next prime is 71378621. The reversal of 71378615 is 51687317.

It is not a de Polignac number, because 71378615 - 2⁶ = 71378551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152612 + ... + 153078.

It is an arithmetic number, because the mean of its divisors is an integer number (3352752).

Almost surely, 2^71378615 is an apocalyptic number.

71378615 is a deficient number, since it is larger than the sum of its proper divisors (35909449).

71378615 is a wasteful number, since it uses less digits than its factorization.

71378615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887.

The product of its digits is 35280, while the sum is 38.

The square root of 71378615 is about 8448.5865681781. The cubic root of 71378615 is about 414.8165153941.

The spelling of 71378615 in words is "seventy-one million, three hundred seventy-eight thousand, six hundred fifteen".