7428981 has 32 divisors (see below), whose sum is σ = 12221440. Its totient is φ = 3919104.

The previous prime is 7428937. The next prime is 7428997. The reversal of 7428981 is 1898247.

It is not a de Polignac number, because 7428981 - 2⁶ = 7428917 is a prime.

It is a super-2 number, since 2×7428981² = 110379517396722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7428581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16941 + ... + 17373.

It is an arithmetic number, because the mean of its divisors is an integer number (381920).

Almost surely, 2^7428981 is an apocalyptic number.

It is an amenable number.

7428981 is a deficient number, since it is larger than the sum of its proper divisors (4792459).

7428981 is a wasteful number, since it uses less digits than its factorization.

7428981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505.

The product of its digits is 32256, while the sum is 39.

The square root of 7428981 is about 2725.6157102570. The cubic root of 7428981 is about 195.1235771588.

The spelling of 7428981 in words is "seven million, four hundred twenty-eight thousand, nine hundred eighty-one".