30719970 has 24 divisors (see below), whose sum is σ = 79872156. Its totient is φ = 8191968.

The previous prime is 30719963. The next prime is 30719971. The reversal of 30719970 is 7991703.

It can be written as a sum of positive squares in 2 ways, for example, as 28740321 + 1979649 = 5361^2 + 1407^2 .

It is not an unprimeable number, because it can be changed into a prime (30719971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170577 + ... + 170756.

Almost surely, 2^30719970 is an apocalyptic number.

30719970 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30719970 is an abundant number, since it is smaller than the sum of its proper divisors (49152186).

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

30719970 is a wasteful number, since it uses less digits than its factorization.

30719970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341346 (or 341343 counting only the distinct ones).

The product of its (nonzero) digits is 11907, while the sum is 36.

The square root of 30719970 is about 5542.5598778904. The cubic root of 30719970 is about 313.1893093438.

It can be divided in two parts, 3071 and 9970, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 30719970 in words is "thirty million, seven hundred nineteen thousand, nine hundred seventy".