742287820 has 48 divisors (see below), whose sum is σ = 1655992800. Its totient is φ = 278691840.

The previous prime is 742287803. The next prime is 742287851. The reversal of 742287820 is 28782247.

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, 32460 + ... + 50380.

It is an arithmetic number, because the mean of its divisors is an integer number (34499850).

Almost surely, 2^742287820 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 742287820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (827996400).

742287820 is an abundant number, since it is smaller than the sum of its proper divisors (913704980).

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

742287820 is a wasteful number, since it uses less digits than its factorization.

742287820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18058 (or 18056 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 742287820 is about 27244.9595338294. The cubic root of 742287820 is about 905.4353470495.

The spelling of 742287820 in words is "seven hundred forty-two million, two hundred eighty-seven thousand, eight hundred twenty".