30780156 has 24 divisors (see below), whose sum is σ = 78349824. Its totient is φ = 9327280.

The previous prime is 30780151. The next prime is 30780161. The reversal of 30780156 is 65108703.

It is an interprime number because it is at equal distance from previous prime (30780151) and next prime (30780161).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30780151) 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, 116460 + ... + 116723.

It is an arithmetic number, because the mean of its divisors is an integer number (3264576).

Almost surely, 2^30780156 is an apocalyptic number.

It is an amenable number.

30780156 is an abundant number, since it is smaller than the sum of its proper divisors (47569668).

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

30780156 is a wasteful number, since it uses less digits than its factorization.

30780156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233201 (or 233199 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 30780156 is about 5547.9866618441. The cubic root of 30780156 is about 313.3937074950.

Adding to 30780156 its reverse (65108703), we get a palindrome (95888859).

The spelling of 30780156 in words is "thirty million, seven hundred eighty thousand, one hundred fifty-six".