30139800 has 96 divisors (see below), whose sum is σ = 94279680. Its totient is φ = 7964800.

The previous prime is 30139799. The next prime is 30139801. The reversal of 30139800 is 893103.

It is an interprime number because it is at equal distance from previous prime (30139799) and next prime (30139801).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30139801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114469 + ... + 114731.

It is an arithmetic number, because the mean of its divisors is an integer number (982080).

Almost surely, 2^30139800 is an apocalyptic number.

30139800 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 30139800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47139840).

30139800 is an abundant number, since it is smaller than the sum of its proper divisors (64139880).

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

30139800 is a wasteful number, since it uses less digits than its factorization.

30139800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 30139800 is about 5489.9726775276. The cubic root of 30139800 is about 311.2051595861.

The spelling of 30139800 in words is "thirty million, one hundred thirty-nine thousand, eight hundred".