30722000 has 40 divisors (see below), whose sum is σ = 74290632. Its totient is φ = 12288000.

The previous prime is 30721987. The next prime is 30722051. The reversal of 30722000 is 22703.

It can be written as a sum of positive squares in 4 ways, for example, as 163216 + 30558784 = 404^2 + 5528^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5681 + ... + 9680.

Almost surely, 2^30722000 is an apocalyptic number.

It is an amenable number.

30722000 is an abundant number, since it is smaller than the sum of its proper divisors (43568632).

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

30722000 is a wasteful number, since it uses less digits than its factorization.

30722000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15384 (or 15368 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 30722000 is about 5542.7430032431. The cubic root of 30722000 is about 313.1962077912.

Adding to 30722000 its reverse (22703), we get a palindrome (30744703).

The spelling of 30722000 in words is "thirty million, seven hundred twenty-two thousand".