30258840 has 32 divisors (see below), whose sum is σ = 90776880. Its totient is φ = 8068992.

The previous prime is 30258829. The next prime is 30258847. The reversal of 30258840 is 4885203.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 30258798 and 30258807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30258847) 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, 125959 + ... + 126198.

Almost surely, 2^30258840 is an apocalyptic number.

30258840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30258840 is an abundant number, since it is smaller than the sum of its proper divisors (60518040).

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

30258840 is a wasteful number, since it uses less digits than its factorization.

30258840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252171 (or 252167 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 30258840 is about 5500.8035776603. The cubic root of 30258840 is about 311.6143328042.

The spelling of 30258840 in words is "thirty million, two hundred fifty-eight thousand, eight hundred forty".