42394780 has 12 divisors (see below), whose sum is σ = 89029080. Its totient is φ = 16957904.

The previous prime is 42394769. The next prime is 42394789. The reversal of 42394780 is 8749324.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42394789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1059850 + ... + 1059889.

It is an arithmetic number, because the mean of its divisors is an integer number (7419090).

Almost surely, 2^42394780 is an apocalyptic number.

It is an amenable number.

42394780 is an abundant number, since it is smaller than the sum of its proper divisors (46634300).

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

42394780 is a wasteful number, since it uses less digits than its factorization.

42394780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119748 (or 2119746 counting only the distinct ones).

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

The square root of 42394780 is about 6511.1273985386. The cubic root of 42394780 is about 348.6883696973.

The spelling of 42394780 in words is "forty-two million, three hundred ninety-four thousand, seven hundred eighty".