7129042090 has 16 divisors (see below), whose sum is σ = 12833652960. Its totient is φ = 2851310800.

The previous prime is 7129042061. The next prime is 7129042091. The reversal of 7129042090 is 902409217.

It is a happy number.

It is a super-2 number, since 2×7129042090² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7129042091) 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, 75765 + ... + 141415.

It is an arithmetic number, because the mean of its divisors is an integer number (802103310).

Almost surely, 2^7129042090 is an apocalyptic number.

7129042090 is a deficient number, since it is larger than the sum of its proper divisors (5704610870).

7129042090 is a wasteful number, since it uses less digits than its factorization.

7129042090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76517.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 7129042090 is about 84433.6549605665. The cubic root of 7129042090 is about 1924.6143796073.

The spelling of 7129042090 in words is "seven billion, one hundred twenty-nine million, forty-two thousand, ninety".