7730381 has 4 divisors (see below), whose sum is σ = 7743264. Its totient is φ = 7717500.

The previous prime is 7730341. The next prime is 7730383. The reversal of 7730381 is 1830377.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1830377 = 991 ⋅1847.

It is a cyclic number.

It is not a de Polignac number, because 7730381 - 2¹⁴ = 7713997 is a prime.

It is a super-2 number, since 2×7730381² = 119517580810322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7730383) 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, 5495 + ... + 6756.

It is an arithmetic number, because the mean of its divisors is an integer number (1935816).

Almost surely, 2^7730381 is an apocalyptic number.

It is an amenable number.

7730381 is a deficient number, since it is larger than the sum of its proper divisors (12883).

7730381 is a wasteful number, since it uses less digits than its factorization.

7730381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12882.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 7730381 is about 2780.3562721349. The cubic root of 7730381 is about 197.7274503960.

The spelling of 7730381 in words is "seven million, seven hundred thirty thousand, three hundred eighty-one".