7238957881 has 4 divisors (see below), whose sum is σ = 7243941412. Its totient is φ = 7233974352.

The previous prime is 7238957837. The next prime is 7238957897. The reversal of 7238957881 is 1887598327.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6511037481 + 727920400 = 80691^2 + 26980^2 .

It is a cyclic number.

It is not a de Polignac number, because 7238957881 - 2¹¹ = 7238955833 is a prime.

It is a super-2 number, since 2×7238957881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7238957821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2489586 + ... + 2492491.

It is an arithmetic number, because the mean of its divisors is an integer number (1810985353).

Almost surely, 2^7238957881 is an apocalyptic number.

It is an amenable number.

7238957881 is a deficient number, since it is larger than the sum of its proper divisors (4983531).

7238957881 is a wasteful number, since it uses less digits than its factorization.

7238957881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4983530.

The product of its digits is 6773760, while the sum is 58.

The square root of 7238957881 is about 85082.0655661344. The cubic root of 7238957881 is about 1934.4552306900.

The spelling of 7238957881 in words is "seven billion, two hundred thirty-eight million, nine hundred fifty-seven thousand, eight hundred eighty-one".