42974820 has 96 divisors (see below), whose sum is σ = 152812800. Its totient is φ = 9821952.

The previous prime is 42974803. The next prime is 42974821. The reversal of 42974820 is 2847924.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (42974821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1905 + ... + 9464.

It is an arithmetic number, because the mean of its divisors is an integer number (1591800).

Almost surely, 2^42974820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42974820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76406400).

42974820 is an abundant number, since it is smaller than the sum of its proper divisors (109837980).

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

42974820 is a wasteful number, since it uses less digits than its factorization.

42974820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11394 (or 11386 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 42974820 is about 6555.5182861464. The cubic root of 42974820 is about 350.2714085287.

The spelling of 42974820 in words is "forty-two million, nine hundred seventy-four thousand, eight hundred twenty".