71942490 has 24 divisors (see below), whose sum is σ = 187050708. Its totient is φ = 19184640.

The previous prime is 71942489. The next prime is 71942501. The reversal of 71942490 is 9424917.

It can be written as a sum of positive squares in 2 ways, for example, as 71927361 + 15129 = 8481^2 + 123^2 .

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 11 ways as a sum of consecutive naturals, for example, 399591 + ... + 399770.

Almost surely, 2^71942490 is an apocalyptic number.

71942490 is an abundant number, since it is smaller than the sum of its proper divisors (115108218).

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

71942490 is a wasteful number, since it uses less digits than its factorization.

71942490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799374 (or 799371 counting only the distinct ones).

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

The square root of 71942490 is about 8481.8918880165. The cubic root of 71942490 is about 415.9059706427.

The spelling of 71942490 in words is "seventy-one million, nine hundred forty-two thousand, four hundred ninety".