7399920 has 80 divisors (see below), whose sum is σ = 25034112. Its totient is φ = 1793280.

The previous prime is 7399907. The next prime is 7399933. The reversal of 7399920 is 299937.

It is an interprime number because it is at equal distance from previous prime (7399907) and next prime (7399933).

It is a tau number, because it is divible by the number of its divisors (80).

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, 1239 + ... + 4041.

Almost surely, 2^7399920 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 7399920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12517056).

7399920 is an abundant number, since it is smaller than the sum of its proper divisors (17634192).

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

7399920 is a wasteful number, since it uses less digits than its factorization.

7399920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830 (or 2824 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 7399920 is about 2720.2793974149. The cubic root of 7399920 is about 194.8688138024.

The spelling of 7399920 in words is "seven million, three hundred ninety-nine thousand, nine hundred twenty".