71573890 has 8 divisors (see below), whose sum is σ = 128833020. Its totient is φ = 28629552.

The previous prime is 71573881. The next prime is 71573899. The reversal of 71573890 is 9837517.

It is an interprime number because it is at equal distance from previous prime (71573881) and next prime (71573899).

It can be written as a sum of positive squares in 2 ways, for example, as 65076489 + 6497401 = 8067^2 + 2549^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (71573899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3578685 + ... + 3578704.

Almost surely, 2^71573890 is an apocalyptic number.

71573890 is a deficient number, since it is larger than the sum of its proper divisors (57259130).

71573890 is a wasteful number, since it uses less digits than its factorization.

71573890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7157396.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 71573890 is about 8460.1353417070. The cubic root of 71573890 is about 415.1944508981.

The spelling of 71573890 in words is "seventy-one million, five hundred seventy-three thousand, eight hundred ninety".