30492280 has 64 divisors (see below), whose sum is σ = 84450240. Its totient is φ = 9649152.

The previous prime is 30492277. The next prime is 30492281. The reversal of 30492280 is 8229403.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30492281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549 + ... + 7828.

It is an arithmetic number, because the mean of its divisors is an integer number (1319535).

Almost surely, 2^30492280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30492280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42225120).

30492280 is an abundant number, since it is smaller than the sum of its proper divisors (53957960).

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

30492280 is a wasteful number, since it uses less digits than its factorization.

30492280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8408 (or 8404 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 30492280 is about 5521.9815284008. The cubic root of 30492280 is about 312.4136251949.

It can be divided in two parts, 3049 and 2280, that added together give a square (5329 = 73²).

The spelling of 30492280 in words is "thirty million, four hundred ninety-two thousand, two hundred eighty".