30421680 has 40 divisors (see below), whose sum is σ = 94307952. Its totient is φ = 8112384.

The previous prime is 30421673. The next prime is 30421681. The reversal of 30421680 is 8612403.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×30421680² = 1850957228044800, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 30421680.

It is not an unprimeable number, because it can be changed into a prime (30421681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63139 + ... + 63618.

Almost surely, 2^30421680 is an apocalyptic number.

30421680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30421680 is an abundant number, since it is smaller than the sum of its proper divisors (63886272).

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

30421680 is a wasteful number, since it uses less digits than its factorization.

30421680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126773 (or 126767 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 30421680 is about 5515.5851910745. The cubic root of 30421680 is about 312.1723242650.

The spelling of 30421680 in words is "thirty million, four hundred twenty-one thousand, six hundred eighty".