7129920 has 112 divisors (see below), whose sum is σ = 25895808. Its totient is φ = 1628160.

The previous prime is 7129877. The next prime is 7130003. The reversal of 7129920 is 299217.

It is a tau number, because it is divible by the number of its divisors (112).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6190 + ... + 7250.

Almost surely, 2^7129920 is an apocalyptic number.

7129920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7129920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12947904).

7129920 is an abundant number, since it is smaller than the sum of its proper divisors (18765888).

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

7129920 is a wasteful number, since it uses less digits than its factorization.

7129920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 7129920 is about 2670.1910044040. The cubic root of 7129920 is about 192.4693378947.

The spelling of 7129920 in words is "seven million, one hundred twenty-nine thousand, nine hundred twenty".