42291620 has 48 divisors (see below), whose sum is σ = 101945088. Its totient is φ = 14436480.

The previous prime is 42291617. The next prime is 42291649. The reversal of 42291620 is 2619224.

It is a super-2 number, since 2×42291620² = 3577162244448800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42291620.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40505 + ... + 41535.

It is an arithmetic number, because the mean of its divisors is an integer number (2123856).

Almost surely, 2^42291620 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 42291620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50972544).

42291620 is an abundant number, since it is smaller than the sum of its proper divisors (59653468).

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

42291620 is a wasteful number, since it uses less digits than its factorization.

42291620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340 (or 1338 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 42291620 is about 6503.2007503998. The cubic root of 42291620 is about 348.4053167068.

The spelling of 42291620 in words is "forty-two million, two hundred ninety-one thousand, six hundred twenty".