7129740 has 48 divisors (see below), whose sum is σ = 20079360. Its totient is φ = 1890240.

The previous prime is 7129729. The next prime is 7129781. The reversal of 7129740 is 479217.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 7129698 and 7129707.

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 15 ways as a sum of consecutive naturals, for example, 19681 + ... + 20039.

It is an arithmetic number, because the mean of its divisors is an integer number (418320).

Almost surely, 2^7129740 is an apocalyptic number.

It is an amenable number.

7129740 is an abundant number, since it is smaller than the sum of its proper divisors (12949620).

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

7129740 is a wasteful number, since it uses less digits than its factorization.

7129740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 7129740 is about 2670.1572987373. The cubic root of 7129740 is about 192.4677182051.

The spelling of 7129740 in words is "seven million, one hundred twenty-nine thousand, seven hundred forty".