30199720 has 16 divisors (see below), whose sum is σ = 67949460. Its totient is φ = 12079872.

The previous prime is 30199699. The next prime is 30199723. The reversal of 30199720 is 2799103.

It can be written as a sum of positive squares in 2 ways, for example, as 26894596 + 3305124 = 5186^2 + 1818^2 .

It is not an unprimeable number, because it can be changed into a prime (30199723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377457 + ... + 377536.

Almost surely, 2^30199720 is an apocalyptic number.

It is an amenable number.

30199720 is an abundant number, since it is smaller than the sum of its proper divisors (37749740).

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

30199720 is a wasteful number, since it uses less digits than its factorization.

30199720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755004 (or 755000 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 30199720 is about 5495.4271899462. The cubic root of 30199720 is about 311.4112555051.

The spelling of 30199720 in words is "thirty million, one hundred ninety-nine thousand, seven hundred twenty".