42455390 has 32 divisors (see below), whose sum is σ = 78744960. Its totient is φ = 16473600.

The previous prime is 42455389. The next prime is 42455423. The reversal of 42455390 is 9355424.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47750 + ... + 48630.

It is an arithmetic number, because the mean of its divisors is an integer number (2460780).

Almost surely, 2^42455390 is an apocalyptic number.

42455390 is a deficient number, since it is larger than the sum of its proper divisors (36289570).

42455390 is a wasteful number, since it uses less digits than its factorization.

42455390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 42455390 is about 6515.7800760922. The cubic root of 42455390 is about 348.8544588449.

The spelling of 42455390 in words is "forty-two million, four hundred fifty-five thousand, three hundred ninety".