30378780 has 96 divisors (see below), whose sum is σ = 95618880. Its totient is φ = 8006400.

The previous prime is 30378763. The next prime is 30378787. The reversal of 30378780 is 8787303.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30378787) 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, 54262 + ... + 54818.

It is an arithmetic number, because the mean of its divisors is an integer number (996030).

Almost surely, 2^30378780 is an apocalyptic number.

30378780 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 30378780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47809440).

30378780 is an abundant number, since it is smaller than the sum of its proper divisors (65240100).

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

30378780 is a wasteful number, since it uses less digits than its factorization.

30378780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 30378780 is about 5511.6948391579. The cubic root of 30378780 is about 312.0255156647.

The spelling of 30378780 in words is "thirty million, three hundred seventy-eight thousand, seven hundred eighty".