71628390 has 24 divisors (see below), whose sum is σ = 186234048. Its totient is φ = 19100880.

The previous prime is 71628379. The next prime is 71628391. The reversal of 71628390 is 9382617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71628391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 397846 + ... + 398025.

It is an arithmetic number, because the mean of its divisors is an integer number (7759752).

Almost surely, 2^71628390 is an apocalyptic number.

71628390 is an abundant number, since it is smaller than the sum of its proper divisors (114605658).

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

71628390 is a wasteful number, since it uses less digits than its factorization.

71628390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795884 (or 795881 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 71628390 is about 8463.3557174445. The cubic root of 71628390 is about 415.2998075517.

The spelling of 71628390 in words is "seventy-one million, six hundred twenty-eight thousand, three hundred ninety".