42790000 has 100 divisors (see below), whose sum is σ = 113307480. Its totient is φ = 15520000.

The previous prime is 42789991. The next prime is 42790001. The reversal of 42790000 is 9724.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42790001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 109806 + ... + 110194.

Almost surely, 2^42790000 is an apocalyptic number.

42790000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42790000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56653740).

42790000 is an abundant number, since it is smaller than the sum of its proper divisors (70517480).

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

42790000 is a wasteful number, since it uses less digits than its factorization.

42790000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 42790000 is about 6541.4065765705. The cubic root of 42790000 is about 349.7685544681.

Adding to 42790000 its reverse (9724), we get a palindrome (42799724).

The spelling of 42790000 in words is "forty-two million, seven hundred ninety thousand".