30699072 has 84 divisors (see below), whose sum is σ = 88757760. Its totient is φ = 10144512.

The previous prime is 30699061. The next prime is 30699073. The reversal of 30699072 is 27099603.

It is a super-2 number, since 2×30699072² = 1884866043322368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (30699073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128329 + ... + 128567.

It is an arithmetic number, because the mean of its divisors is an integer number (1056640).

Almost surely, 2^30699072 is an apocalyptic number.

30699072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30699072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44378880).

30699072 is an abundant number, since it is smaller than the sum of its proper divisors (58058688).

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

30699072 is a wasteful number, since it uses less digits than its factorization.

30699072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 30699072 is about 5540.6743271916. The cubic root of 30699072 is about 313.1182750417.

The spelling of 30699072 in words is "thirty million, six hundred ninety-nine thousand, seventy-two".