42649386 has 32 divisors (see below), whose sum is σ = 93242688. Its totient is φ = 12925440.

The previous prime is 42649381. The next prime is 42649391. The reversal of 42649386 is 68394624.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42649381) and next prime (42649391).

It is not an unprimeable number, because it can be changed into a prime (42649381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1146 + ... + 9306.

It is an arithmetic number, because the mean of its divisors is an integer number (2913834).

Almost surely, 2^42649386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42649386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46621344).

42649386 is an abundant number, since it is smaller than the sum of its proper divisors (50593302).

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

42649386 is a wasteful number, since it uses less digits than its factorization.

42649386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8246.

The product of its digits is 248832, while the sum is 42.

The square root of 42649386 is about 6530.6497379664. The cubic root of 42649386 is about 349.3850043591.

The spelling of 42649386 in words is "forty-two million, six hundred forty-nine thousand, three hundred eighty-six".