30420755 has 8 divisors (see below), whose sum is σ = 36567600. Its totient is φ = 24294816.

The previous prime is 30420751. The next prime is 30420763. The reversal of 30420755 is 55702403.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30420755 - 2² = 30420751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30420751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1820 + ... + 8009.

It is an arithmetic number, because the mean of its divisors is an integer number (4570950).

Almost surely, 2^30420755 is an apocalyptic number.

30420755 is a deficient number, since it is larger than the sum of its proper divisors (6146845).

30420755 is an equidigital number, since it uses as much as digits as its factorization.

30420755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10453.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 30420755 is about 5515.5013371406. The cubic root of 30420755 is about 312.1691602678.

The spelling of 30420755 in words is "thirty million, four hundred twenty thousand, seven hundred fifty-five".