30992700 has 144 divisors (see below), whose sum is σ = 97493760. Its totient is φ = 7572480.

The previous prime is 30992671. The next prime is 30992701. The reversal of 30992700 is 729903.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30992701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 300849 + ... + 300951.

It is an arithmetic number, because the mean of its divisors is an integer number (677040).

Almost surely, 2^30992700 is an apocalyptic number.

30992700 is a gapful number since it is divisible by the number (30) 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 30992700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48746880).

30992700 is an abundant number, since it is smaller than the sum of its proper divisors (66501060).

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

30992700 is a wasteful number, since it uses less digits than its factorization.

30992700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 30992700 is about 5567.1087648797. The cubic root of 30992700 is about 314.1134051541.

The spelling of 30992700 in words is "thirty million, nine hundred ninety-two thousand, seven hundred".