42649490 has 64 divisors (see below), whose sum is σ = 89994240. Its totient is φ = 14411520.

The previous prime is 42649489. The next prime is 42649501. The reversal of 42649490 is 9494624.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76292 + ... + 76848.

It is an arithmetic number, because the mean of its divisors is an integer number (1406160).

Almost surely, 2^42649490 is an apocalyptic number.

42649490 is an abundant number, since it is smaller than the sum of its proper divisors (47344750).

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

42649490 is a wasteful number, since it uses less digits than its factorization.

42649490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 42649490 is about 6530.6577004158. The cubic root of 42649490 is about 349.3852883492.

The spelling of 42649490 in words is "forty-two million, six hundred forty-nine thousand, four hundred ninety".