42403290 has 16 divisors (see below), whose sum is σ = 101767968. Its totient is φ = 11307536.

The previous prime is 42403261. The next prime is 42403297. The reversal of 42403290 is 9230424.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42403290.

It is not an unprimeable number, because it can be changed into a prime (42403297) 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, 706692 + ... + 706751.

It is an arithmetic number, because the mean of its divisors is an integer number (6360498).

Almost surely, 2^42403290 is an apocalyptic number.

42403290 is an abundant number, since it is smaller than the sum of its proper divisors (59364678).

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

42403290 is a wasteful number, since it uses less digits than its factorization.

42403290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413453.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 42403290 is about 6511.7808624062. The cubic root of 42403290 is about 348.7116991378.

The spelling of 42403290 in words is "forty-two million, four hundred three thousand, two hundred ninety".