42640530 has 16 divisors (see below), whose sum is σ = 102337344. Its totient is φ = 11370800.

The previous prime is 42640517. The next prime is 42640553. The reversal of 42640530 is 3504624.

It is a self number, because there is not a number n which added to its sum of digits gives 42640530.

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, 710646 + ... + 710705.

It is an arithmetic number, because the mean of its divisors is an integer number (6396084).

Almost surely, 2^42640530 is an apocalyptic number.

42640530 is an abundant number, since it is smaller than the sum of its proper divisors (59696814).

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

42640530 is a wasteful number, since it uses less digits than its factorization.

42640530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421361.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 42640530 is about 6529.9716691575. The cubic root of 42640530 is about 349.3608198157.

The spelling of 42640530 in words is "forty-two million, six hundred forty thousand, five hundred thirty".