42651798 has 64 divisors (see below), whose sum is σ = 103403520. Its totient is φ = 11464992.

The previous prime is 42651797. The next prime is 42651811. The reversal of 42651798 is 89715624.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42651797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64393 + ... + 65051.

It is an arithmetic number, because the mean of its divisors is an integer number (1615680).

Almost surely, 2^42651798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42651798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51701760).

42651798 is an abundant number, since it is smaller than the sum of its proper divisors (60751722).

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

42651798 is a wasteful number, since it uses less digits than its factorization.

42651798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761.

The product of its digits is 120960, while the sum is 42.

The square root of 42651798 is about 6530.8344030453. The cubic root of 42651798 is about 349.3915906262.

The spelling of 42651798 in words is "forty-two million, six hundred fifty-one thousand, seven hundred ninety-eight".