30474990 has 144 divisors (see below), whose sum is σ = 99144864. Its totient is φ = 6324480.

The previous prime is 30474989. The next prime is 30475009. The reversal of 30474990 is 9947403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 499560 + ... + 499620.

It is an arithmetic number, because the mean of its divisors is an integer number (688506).

Almost surely, 2^30474990 is an apocalyptic number.

30474990 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 30474990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49572432).

30474990 is an abundant number, since it is smaller than the sum of its proper divisors (68669874).

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

30474990 is a wasteful number, since it uses less digits than its factorization.

30474990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 30474990 is about 5520.4157452134. The cubic root of 30474990 is about 312.3545648594.

The spelling of 30474990 in words is "thirty million, four hundred seventy-four thousand, nine hundred ninety".