642077480 has 64 divisors (see below), whose sum is σ = 1584144000. Its totient is φ = 232277760.

The previous prime is 642077473. The next prime is 642077497. The reversal of 642077480 is 84770246.

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, 83894 + ... + 91226.

It is an arithmetic number, because the mean of its divisors is an integer number (24752250).

Almost surely, 2^642077480 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 642077480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (792072000).

642077480 is an abundant number, since it is smaller than the sum of its proper divisors (942066520).

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

642077480 is a wasteful number, since it uses less digits than its factorization.

642077480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7554 (or 7550 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 642077480 is about 25339.2478183548. The cubic root of 642077480 is about 862.7053261776.

The spelling of 642077480 in words is "six hundred forty-two million, seventy-seven thousand, four hundred eighty".