42978430 has 32 divisors (see below), whose sum is σ = 85598208. Its totient is φ = 15405600.

The previous prime is 42978413. The next prime is 42978443. The reversal of 42978430 is 3487924.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 42978430.

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, 5059 + ... + 10561.

It is an arithmetic number, because the mean of its divisors is an integer number (2674944).

Almost surely, 2^42978430 is an apocalyptic number.

42978430 is a deficient number, since it is larger than the sum of its proper divisors (42619778).

42978430 is a wasteful number, since it uses less digits than its factorization.

42978430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5592.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 42978430 is about 6555.7936209127. The cubic root of 42978430 is about 350.2812161663.

The spelling of 42978430 in words is "forty-two million, nine hundred seventy-eight thousand, four hundred thirty".