7129139490 has 96 divisors (see below), whose sum is σ = 20400097536. Its totient is φ = 1712954880.

The previous prime is 7129139467. The next prime is 7129139509. The reversal of 7129139490 is 949319217.

7129139490 is a `hidden beast` number, since 7 + 1 + 29 + 139 + 490 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80007 + ... + 143733.

It is an arithmetic number, because the mean of its divisors is an integer number (212501016).

Almost surely, 2^7129139490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7129139490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10200048768).

7129139490 is an abundant number, since it is smaller than the sum of its proper divisors (13270958046).

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

7129139490 is a wasteful number, since it uses less digits than its factorization.

7129139490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63864 (or 63861 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 7129139490 is about 84434.2317428186. The cubic root of 7129139490 is about 1924.6231445337.

The spelling of 7129139490 in words is "seven billion, one hundred twenty-nine million, one hundred thirty-nine thousand, four hundred ninety".