30151640 has 32 divisors (see below), whose sum is σ = 68310000. Its totient is φ = 11977344.

The previous prime is 30151621. The next prime is 30151661. The reversal of 30151640 is 4615103.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3431 + ... + 8489.

Almost surely, 2^30151640 is an apocalyptic number.

It is an amenable number.

30151640 is an abundant number, since it is smaller than the sum of its proper divisors (38158360).

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

30151640 is a wasteful number, since it uses less digits than its factorization.

30151640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5219 (or 5215 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 30151640 is about 5491.0509012392. The cubic root of 30151640 is about 311.2459051197.

Adding to 30151640 its reverse (4615103), we get a palindrome (34766743).

The spelling of 30151640 in words is "thirty million, one hundred fifty-one thousand, six hundred forty".