30749400 has 144 divisors (see below), whose sum is σ = 112727160. Its totient is φ = 7449600.

The previous prime is 30749399. The next prime is 30749423. The reversal of 30749400 is 494703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19024 + ... + 20576.

Almost surely, 2^30749400 is an apocalyptic number.

30749400 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 30749400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56363580).

30749400 is an abundant number, since it is smaller than the sum of its proper divisors (81977760).

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

30749400 is a wasteful number, since it uses less digits than its factorization.

30749400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586 (or 1574 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 30749400 is about 5545.2141527627. The cubic root of 30749400 is about 313.2892901225.

The spelling of 30749400 in words is "thirty million, seven hundred forty-nine thousand, four hundred".