30797550 has 96 divisors (see below), whose sum is σ = 97017600. Its totient is φ = 7037280.

The previous prime is 30797521. The next prime is 30797551. The reversal of 30797550 is 5579703.

30797550 is a `hidden beast` number, since 30 + 79 + 7 + 550 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30797551) 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, 7821 + ... + 11079.

It is an arithmetic number, because the mean of its divisors is an integer number (1010600).

Almost surely, 2^30797550 is an apocalyptic number.

30797550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30797550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48508800).

30797550 is an abundant number, since it is smaller than the sum of its proper divisors (66220050).

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

30797550 is a wasteful number, since it uses less digits than its factorization.

30797550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3287 (or 3276 counting only the distinct ones).

The product of its (nonzero) digits is 33075, while the sum is 36.

The square root of 30797550 is about 5549.5540361366. The cubic root of 30797550 is about 313.4527297607.

It can be divided in two parts, 307975 and 50, that added together give a square (308025 = 555²).

The spelling of 30797550 in words is "thirty million, seven hundred ninety-seven thousand, five hundred fifty".