30401905 has 4 divisors (see below), whose sum is σ = 36482292. Its totient is φ = 24321520.

The previous prime is 30401893. The next prime is 30401911. The reversal of 30401905 is 50910403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50910403 = 89 ⋅572027.

It can be written as a sum of positive squares in 2 ways, for example, as 20007729 + 10394176 = 4473^2 + 3224^2 .

It is a de Polignac number, because none of the positive numbers 2^k-30401905 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3040186 + ... + 3040195.

It is an arithmetic number, because the mean of its divisors is an integer number (9120573).

Almost surely, 2^30401905 is an apocalyptic number.

It is an amenable number.

30401905 is a deficient number, since it is larger than the sum of its proper divisors (6080387).

30401905 is an equidigital number, since it uses as much as digits as its factorization.

30401905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6080386.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 30401905 is about 5513.7922521618. The cubic root of 30401905 is about 312.1046691608.

The spelling of 30401905 in words is "thirty million, four hundred one thousand, nine hundred five".