71292890 has 16 divisors (see below), whose sum is σ = 131058432. Its totient is φ = 27910224.

The previous prime is 71292857. The next prime is 71292899. The reversal of 71292890 is 9829217.

It is not an unprimeable number, because it can be changed into a prime (71292899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75374 + ... + 76313.

It is an arithmetic number, because the mean of its divisors is an integer number (8191152).

Almost surely, 2^71292890 is an apocalyptic number.

71292890 is a deficient number, since it is larger than the sum of its proper divisors (59765542).

71292890 is a wasteful number, since it uses less digits than its factorization.

71292890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151741.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 71292890 is about 8443.5117101832. The cubic root of 71292890 is about 414.6503853794.

The spelling of 71292890 in words is "seventy-one million, two hundred ninety-two thousand, eight hundred ninety".