30740641 has 8 divisors (see below), whose sum is σ = 32666760. Its totient is φ = 28927744.

The previous prime is 30740639. The next prime is 30740707. The reversal of 30740641 is 14604703.

30740641 = 3920² + 3921².

It can be written as a sum of positive squares in 4 ways, for example, as 15366400 + 15374241 = 3920^2 + 3921^2 .

It is not a de Polignac number, because 30740641 - 2¹ = 30740639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30743641) 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, 1785 + ... + 8041.

It is an arithmetic number, because the mean of its divisors is an integer number (4083345).

Almost surely, 2^30740641 is an apocalyptic number.

30740641 is the 3921-st centered square number.

It is an amenable number.

30740641 is a deficient number, since it is larger than the sum of its proper divisors (1926119).

30740641 is an frugal number, since it uses more digits than its factorization.

30740641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308 (or 6274 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 30740641 is about 5544.4243163741. The cubic root of 30740641 is about 313.2595403660.

The spelling of 30740641 in words is "thirty million, seven hundred forty thousand, six hundred forty-one".