71405478 has 36 divisors (see below), whose sum is σ = 161752500. Its totient is φ = 22763928.

The previous prime is 71405473. The next prime is 71405489. The reversal of 71405478 is 87450417.

71405478 is a `hidden beast` number, since 71 + 40 + 547 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71405473) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5773 + ... + 13271.

It is an arithmetic number, because the mean of its divisors is an integer number (4493125).

Almost surely, 2^71405478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71405478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80876250).

71405478 is an abundant number, since it is smaller than the sum of its proper divisors (90347022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71405478 is a wasteful number, since it uses less digits than its factorization.

71405478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7553 (or 7527 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 71405478 is about 8450.1762111805. The cubic root of 71405478 is about 414.8685469372.

The spelling of 71405478 in words is "seventy-one million, four hundred five thousand, four hundred seventy-eight".