30505540 has 24 divisors (see below), whose sum is σ = 68990040. Its totient is φ = 11263488.

The previous prime is 30505529. The next prime is 30505543. The reversal of 30505540 is 4550503.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1085764 + 29419776 = 1042^2 + 5424^2 .

It is not an unprimeable number, because it can be changed into a prime (30505543) 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, 58405 + ... + 58924.

It is an arithmetic number, because the mean of its divisors is an integer number (2874585).

Almost surely, 2^30505540 is an apocalyptic number.

It is an amenable number.

30505540 is an abundant number, since it is smaller than the sum of its proper divisors (38484500).

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

30505540 is a wasteful number, since it uses less digits than its factorization.

30505540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117351 (or 117349 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 30505540 is about 5523.1820538527. The cubic root of 30505540 is about 312.4589044626.

The spelling of 30505540 in words is "thirty million, five hundred five thousand, five hundred forty".