30840136 has 16 divisors (see below), whose sum is σ = 58774140. Its totient is φ = 15167040.

The previous prime is 30840109. The next prime is 30840143. The reversal of 30840136 is 63104803.

It can be written as a sum of positive squares in 2 ways, for example, as 30802500 + 37636 = 5550^2 + 194^2 .

It is a super-2 number, since 2×30840136² = 1902227976996992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30840136.

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, 31111 + ... + 32086.

Almost surely, 2^30840136 is an apocalyptic number.

It is an amenable number.

30840136 is a deficient number, since it is larger than the sum of its proper divisors (27934004).

30840136 is a wasteful number, since it uses less digits than its factorization.

30840136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63264 (or 63260 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 30840136 is about 5553.3895955533. The cubic root of 30840136 is about 313.5971411391.

Adding to 30840136 its reverse (63104803), we get a palindrome (93944939).

It can be divided in two parts, 30840 and 136, that added together give a square (30976 = 176²).

The spelling of 30840136 in words is "thirty million, eight hundred forty thousand, one hundred thirty-six".