71478407 has 36 divisors (see below), whose sum is σ = 98661528. Its totient is φ = 50904000.

The previous prime is 71478401. The next prime is 71478409. The reversal of 71478407 is 70487417.

It is not a de Polignac number, because 71478407 - 2⁴ = 71478391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71478401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 707657 + ... + 707757.

It is an arithmetic number, because the mean of its divisors is an integer number (2740598).

Almost surely, 2^71478407 is an apocalyptic number.

71478407 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

71478407 is a deficient number, since it is larger than the sum of its proper divisors (27183121).

71478407 is a wasteful number, since it uses less digits than its factorization.

71478407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 71478407 is about 8454.4903453727. The cubic root of 71478407 is about 415.0097389692.

The spelling of 71478407 in words is "seventy-one million, four hundred seventy-eight thousand, four hundred seven".