30499980 has 96 divisors (see below), whose sum is σ = 98703360. Its totient is φ = 6892800.

The previous prime is 30499969. The next prime is 30499993. The reversal of 30499980 is 8999403.

30499980 = T₆₃ + T₆₄ + ... + T₅₆₇.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42061 + ... + 42779.

It is an arithmetic number, because the mean of its divisors is an integer number (1028160).

Almost surely, 2^30499980 is an apocalyptic number.

30499980 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 30499980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49351680).

30499980 is an abundant number, since it is smaller than the sum of its proper divisors (68203380).

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

30499980 is a wasteful number, since it uses less digits than its factorization.

30499980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 30499980 is about 5522.6786978784. The cubic root of 30499980 is about 312.4399201834.

The spelling of 30499980 in words is "thirty million, four hundred ninety-nine thousand, nine hundred eighty".