7420688 has 30 divisors (see below), whose sum is σ = 15807582. Its totient is φ = 3372160.

The previous prime is 7420681. The next prime is 7420691. The reversal of 7420688 is 8860247.

It can be written as a sum of positive squares in only one way, i.e., 5438224 + 1982464 = 2332^2 + 1408^2 .

It is a super-2 number, since 2×7420688² = 110133220786688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7420681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20 + ... + 3852.

Almost surely, 2^7420688 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 7420688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7903791).

7420688 is an abundant number, since it is smaller than the sum of its proper divisors (8386894).

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

7420688 is a wasteful number, since it uses less digits than its factorization.

7420688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3863 (or 3846 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 7420688 is about 2724.0939778209. The cubic root of 7420688 is about 195.0509443927.

The spelling of 7420688 in words is "seven million, four hundred twenty thousand, six hundred eighty-eight".