30638190 has 64 divisors (see below), whose sum is σ = 80766720. Its totient is φ = 7376640.

The previous prime is 30638189. The next prime is 30638197. The reversal of 30638190 is 9183603.

It is a super-2 number, since 2×30638190² = 1877397372952200, which contains 22 as substring.

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 (30638197) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74706 + ... + 75114.

It is an arithmetic number, because the mean of its divisors is an integer number (1261980).

Almost surely, 2^30638190 is an apocalyptic number.

30638190 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 30638190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40383360).

30638190 is an abundant number, since it is smaller than the sum of its proper divisors (50128530).

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

30638190 is a wasteful number, since it uses less digits than its factorization.

30638190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 30638190 is about 5535.1775039288. The cubic root of 30638190 is about 312.9111473612.

The spelling of 30638190 in words is "thirty million, six hundred thirty-eight thousand, one hundred ninety".