71428590 has 48 divisors (see below), whose sum is σ = 190043568. Its totient is φ = 18603648.

The previous prime is 71428589. The next prime is 71428603. The reversal of 71428590 is 9582417.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5359 + ... + 13098.

It is an arithmetic number, because the mean of its divisors is an integer number (3959241).

Almost surely, 2^71428590 is an apocalyptic number.

71428590 is an abundant number, since it is smaller than the sum of its proper divisors (118614978).

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

71428590 is a wasteful number, since it uses less digits than its factorization.

71428590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18513 (or 18510 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 71428590 is about 8451.5436459856. The cubic root of 71428590 is about 414.9133026423.

The spelling of 71428590 in words is "seventy-one million, four hundred twenty-eight thousand, five hundred ninety".