30878036 has 36 divisors (see below), whose sum is σ = 63206388. Its totient is φ = 13160448.

The previous prime is 30878033. The next prime is 30878039. The reversal of 30878036 is 63087803.

It is an interprime number because it is at equal distance from previous prime (30878033) and next prime (30878039).

It can be written as a sum of positive squares in 2 ways, for example, as 14394436 + 16483600 = 3794^2 + 4060^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30877987 and 30878005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30878033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50066 + ... + 50678.

It is an arithmetic number, because the mean of its divisors is an integer number (1755733).

Almost surely, 2^30878036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30878036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31603194).

30878036 is an abundant number, since it is smaller than the sum of its proper divisors (32328352).

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

30878036 is a wasteful number, since it uses less digits than its factorization.

30878036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 30878036 is about 5556.8008782032. The cubic root of 30878036 is about 313.7255502817.

The spelling of 30878036 in words is "thirty million, eight hundred seventy-eight thousand, thirty-six".