7129980 has 144 divisors (see below), whose sum is σ = 25500384. Its totient is φ = 1589760.

The previous prime is 7129877. The next prime is 7130003. The reversal of 7129980 is 899217.

It is a happy number.

It is a super-2 number, since 2×7129980² = 101673229600800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 25602 + ... + 25878.

It is an arithmetic number, because the mean of its divisors is an integer number (177086).

Almost surely, 2^7129980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7129980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12750192).

7129980 is an abundant number, since it is smaller than the sum of its proper divisors (18370404).

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

7129980 is a wasteful number, since it uses less digits than its factorization.

7129980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 7129980 is about 2670.2022395317. The cubic root of 7129980 is about 192.4698777852.

The spelling of 7129980 in words is "seven million, one hundred twenty-nine thousand, nine hundred eighty".