30640501 has 4 divisors (see below), whose sum is σ = 31697100. Its totient is φ = 29583904.

The previous prime is 30640481. The next prime is 30640513. The reversal of 30640501 is 10504603.

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 10074276 + 20566225 = 3174^2 + 4535^2 .

It is a cyclic number.

It is not a de Polignac number, because 30640501 - 2⁵ = 30640469 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 (30640601) 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, 528256 + ... + 528313.

It is an arithmetic number, because the mean of its divisors is an integer number (7924275).

Almost surely, 2^30640501 is an apocalyptic number.

30640501 is the 2476-th centered decagonal number.

It is an amenable number.

30640501 is a deficient number, since it is larger than the sum of its proper divisors (1056599).

30640501 is a wasteful number, since it uses less digits than its factorization.

30640501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056598.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 30640501 is about 5535.3862557187. The cubic root of 30640501 is about 312.9190146610.

The spelling of 30640501 in words is "thirty million, six hundred forty thousand, five hundred one".