30955440 has 40 divisors (see below), whose sum is σ = 95962608. Its totient is φ = 8254720.

The previous prime is 30955433. The next prime is 30955481. The reversal of 30955440 is 4455903.

30955440 = 968² + 969² + ... + 999².

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

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 = 30955398 and 30955407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64251 + ... + 64730.

Almost surely, 2^30955440 is an apocalyptic number.

30955440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30955440 is an abundant number, since it is smaller than the sum of its proper divisors (65007168).

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

30955440 is a wasteful number, since it uses less digits than its factorization.

30955440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128997 (or 128991 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 30955440 is about 5563.7613176699. The cubic root of 30955440 is about 313.9874770182.

The spelling of 30955440 in words is "thirty million, nine hundred fifty-five thousand, four hundred forty".