30140436 has 12 divisors (see below), whose sum is σ = 70327712. Its totient is φ = 10046808.

The previous prime is 30140431. The next prime is 30140449. The reversal of 30140436 is 63404103.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30140431) 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, 1255840 + ... + 1255863.

Almost surely, 2^30140436 is an apocalyptic number.

It is an amenable number.

30140436 is an abundant number, since it is smaller than the sum of its proper divisors (40187276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30140436 is a wasteful number, since it uses less digits than its factorization.

30140436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511710 (or 2511708 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 30140436 is about 5490.0306010076. The cubic root of 30140436 is about 311.2073485531.

Adding to 30140436 its reverse (63404103), we get a palindrome (93544539).

The spelling of 30140436 in words is "thirty million, one hundred forty thousand, four hundred thirty-six".