71958990 has 16 divisors (see below), whose sum is σ = 172701648. Its totient is φ = 19189056.

The previous prime is 71958961. The next prime is 71959003. The reversal of 71958990 is 9985917.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1199287 + ... + 1199346.

It is an arithmetic number, because the mean of its divisors is an integer number (10793853).

Almost surely, 2^71958990 is an apocalyptic number.

71958990 is an abundant number, since it is smaller than the sum of its proper divisors (100742658).

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

71958990 is a wasteful number, since it uses less digits than its factorization.

71958990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398643.

The product of its (nonzero) digits is 204120, while the sum is 48.

The square root of 71958990 is about 8482.8644926110. The cubic root of 71958990 is about 415.9377642042.

The spelling of 71958990 in words is "seventy-one million, nine hundred fifty-eight thousand, nine hundred ninety".