71407028 has 24 divisors (see below), whose sum is σ = 155797824. Its totient is φ = 27820800.

The previous prime is 71407013. The next prime is 71407031. The reversal of 71407028 is 82070417.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 115613 + ... + 116228.

It is an arithmetic number, because the mean of its divisors is an integer number (6491576).

Almost surely, 2^71407028 is an apocalyptic number.

It is an amenable number.

71407028 is an abundant number, since it is smaller than the sum of its proper divisors (84390796).

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

71407028 is a wasteful number, since it uses less digits than its factorization.

71407028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231863 (or 231861 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 71407028 is about 8450.2679247465. The cubic root of 71407028 is about 414.8715487685.

The spelling of 71407028 in words is "seventy-one million, four hundred seven thousand, twenty-eight".