30865440 has 48 divisors (see below), whose sum is σ = 97227648. Its totient is φ = 8230656.

The previous prime is 30865433. The next prime is 30865463. The reversal of 30865440 is 4456803.

It is a tau number, because it is divible by the number of its divisors (48).

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 = 30865398 and 30865407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31672 + ... + 32631.

It is an arithmetic number, because the mean of its divisors is an integer number (2025576).

Almost surely, 2^30865440 is an apocalyptic number.

30865440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30865440 is an abundant number, since it is smaller than the sum of its proper divisors (66362208).

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

30865440 is a wasteful number, since it uses less digits than its factorization.

30865440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64321 (or 64313 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 30865440 is about 5555.6673766524. The cubic root of 30865440 is about 313.6828853868.

The spelling of 30865440 in words is "thirty million, eight hundred sixty-five thousand, four hundred forty".